Number analogy: first = 3 x cube of second

The same question, asked 2 times: 24 Jul 2023 S4*, 25 Jul 2023 S1. Every wording below, oldest first.

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Question 1
24 Jul 2023 S4
16 $Select the option that is related to the fifth term in the same way as the second term is related to the first term and the fourth term is related to the third term. 24 : 2 :: 81: 3 :: 375 : ?$
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Question 2
25 Jul 2023 S1
20 $Select the option that is related to the fifth number in the same way as the second number is related to the first number and the fourth number is related to the third number. 1029 : 7 :: 2187 : 9 :: 24 : ?$
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Question 1