If 20 is to 30, what is 60 to?

To solve the relationship presented in the question, one can analyze the ratio between the first pair of numbers, 20 and 30. The ratio is expressed as:

20:30 = 2:3

This implies that for every 2 parts of 20, there are 3 parts of 30. To maintain the same proportional relationship, you can apply this ratio to the second number, 60.

Let’s denote the unknown number as 'x'. Setting up the proportion to reflect the same ratio gives:

60:x = 2:3

Cross-multiplying yields:

2x = 60 * 3

2x = 180

Dividing both sides by 2 results in:

x = 90

Thus, the number that corresponds to maintain the same relationship as 20 to 30 when starting with 60 is 90. Therefore, the correct answer in this context is indeed 90.