Poroi was born in Mataiea on Tahiti and educated at l’école Viénot in Papeete.
[1] In 1934 he was one of the founders of the Radio-Club Océanien, which ran the first radio station in Tahiti, and later served as its president.
[5] Following a dispute in the Assembly on 10 April 1953, a fight broke out between Poroi and Noël Ilari.
The duel ultimately did not occur, after Governor René Petitbon broadcast a radio message forbidding it and stationed police at the homes of the participants.
[1][9] In the subsequent 1962 Assembly elections he formed a coalition with the Democratic Rally of the Tahitian People.