What is the net worth of Isha Ambani and Anand Piramal's families?

Isha Ambani, daughter of Reliance Industries Chairman Mukesh Ambani, is getting formally engaged to Anand Piramal, son of Piramal Group Chairman Ajay Piramal. Mukesh Ambani is Asia's richest man with a net worth of around $47 billion according to Forbes. Ajay Piramal is the 404th richest person in the world, with a net worth of $4.8 billion.