Select the option that is related to the third term in the same way as the second term is related to the first term and the sixth term is related to the fifth term.
$$29:61::47:?::15:33$$

Let us analyze the operations that transform the first term into the second term across the known pairs:
* From the third pair ($15:33$):

$$15\times 2+3=30+3=33$$

* From the first pair ($29:61$):

$$29\times 2+3=58+3=61$$

The common relational pattern is:

$$\text{Second Term}=(\text{First Term}\times 2)+3$$

Applying the identical logic to the middle term ($47$):

$$\text{Missing Term}=(47\times 2)+3=94+3=97$$

Therefore, the missing number is 97.