もらいましょう

let's have (someone) do...

→ 貰う
もらい receive, get + ましょう Volitional (let’s / shall)
auxiliary · optative Rare #31,042
let's have (someone) do... Used after the て-form of a verb to suggest having someone do something for us.
JA: 先生にもう一度説明してもらいましょう。
EN: Let's have the teacher explain it one more time.
Conjugation of 貰う
Optative
もらおうもらいましょう

彼にはあさってここに来てもらいましょう

Let's have him come here the day after tomorrow.

その彫像バックにして私達の写真を撮ってもらいましょう

Let's have someone take our picture with that statue in the background.

借金をきれいに返済してもらいましょう

Shall we have them repay the debt in full?

明日高先生に来てもらいましょう

Let's ask Mr. Gao to come tomorrow.

— 紅夢 (1991)

兄さんに頼んで自転車乗せてもらいましょう

Let's ask big brother to give us a ride on his bicycle.

明日このラジオを修理してもらいましょう

Let's have this radio repaired tomorrow.