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Hello There Awesome User!

The answer could be 54.

As you can see the relationship between 24 and 36 is 12. You find this out by subtracting 36-24=12. Where as you could add 42 to 12 which equals to 54. So, the answer is 54.

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apologiabiology
it could be a proportion
24:36=42:x
make into fractions
24/36=42/x
2/3=42/x
multiply both sides by 3x
2x=126
divid oth sides by 2
x=63

the other number is 63

24:36=42:63