He won a bronze medal at the 1928 Summer Olympics.

He was a member of the Slovenian Sokol athletics movement.

In Amsterdam, where the Yugoslav team won five medals in total, Porenta was a member of the bronze medal winning team at the team competition, together with Edvard Antosiewicz, Stane Derganc, Dragutin Ciotti, Boris Gregorka, Anton Malej, Jože Primožič, and Leon Štukelj.

[1] During the Second World War, Porenta was active in the Liberation Front of the Slovene Nation.

In 1942, he was arrested by the forces of Fascist Italy for involvement in the murder of the banker and businessman Avgust Praprotnik (1891–1942) and then shot at the Gramozna Jama ('gravel pit') site in Ljubljana.