Let x be the fifth number

⇔

⇔ 23.3 + x = 34
⇔ x = 10.7
The answer is 5.1 when you enter it into a calculator :)
Answer:
The other two angles are 75° and 125°.
Step-by-step explanation:
Let three angles are 2x, 3x and 5x.
The smallest angle is 50.
It means,
2x = 50
x = 25
So,
3x = 3(25) = 75°
5x = 5(25) = 125°
So, the other two angles are 75° and 125°.