1. Conversion Factor:

* 1 kilometer (km) = 0.621371 miles

2. Calculation:

* 150,000,000 km * 0.621371 miles/km = 93,205,650 miles

3. Expressing in Million Miles:

* 93,205,650 miles / 1,000,000 = 93.21 million miles (approximately)

Therefore, the Earth orbits the Sun at an average distance of approximately 93.21 million miles.