70 million as a proportion of 1.72 billion = 7/17200
70 million : 1.72 billion
= 70000000:172000000000
= 70000000/172000000000
= 7/17200
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Seventy thousand million in numbers is: 70,000,000,000 (70 billion).
It is 8025046070.
91,013,070,002
91,013,070,002
172 = 100 + 70 + 2 = CLXXII