The last powerful ruler of the Mauryan Empire was:

Ashoka
Bindusara
Brihadratha
Chandragupta I

The last powerful ruler of the Mauryan Empire was Brihadratha. He was the grandson of Ashoka the Great and ruled from 272 to 268 BCE. Brihadratha was assassinated by his general, Pushyamitra Shunga, who founded the Shunga dynasty.

Ashoka the Great was the third Mauryan emperor and one of the greatest rulers in Indian history. He was known for his military conquests, as well as his Buddhist reforms. Ashoka converted to Buddhism after the Kalinga War, in which he is said to have been horrified by the bloodshed. He renounced violence and promoted Buddhist values of peace and non-violence. Ashoka’s edicts, which were inscribed on rocks and pillars throughout his empire, promoted Buddhist values and urged his subjects to live in harmony.

Bindusara was the second Mauryan emperor and the son of Chandragupta Maurya. He ruled from 297 to 272 BCE. Bindusara was a powerful ruler who expanded the Mauryan Empire to its greatest extent. He is said to have conquered 16 countries, including Kalinga, Chola, Pandya, and Chera.

Chandragupta Maurya was the founder of the Mauryan Empire. He ruled from 321 to 297 BCE. Chandragupta was a powerful ruler who united much of India under his rule. He is said to have defeated the Nanda dynasty and founded the Mauryan Empire.

Pushyamitra Shunga was the founder of the Shunga dynasty. He was a general in the Mauryan army who assassinated Brihadratha, the last Mauryan emperor. Pushyamitra Shunga ruled from 268 to 232 BCE. He is said to have been a cruel ruler who persecuted Buddhists.