He is a member of the Indonesian Democratic Party of Struggle (PDIP), and allied to Megawati Sukarnoputri.

On 2008 Balinese Governor Election, Beratha has been replacing by I Made Mangku Pastika.

He received his degree from Gajah Mada University in Social Politic Faculty.

He started his career in 1967 as Secretary Officer of Bangli Regency.

He is married to I Gusti Agung Ayu Mas and has four children: Dewa Gde Joni Asta Brata, Dewa Gde Juli Arta Brata, Desak Nyoman Anggreni, and Dewa Gde Darma Putra.