- Let's assume the third number is **X**.
- First number is 17% less than **X**:
- **0.83X** (since 100% - 17% = 83%).
- Second number is 50% less than **X**:
- **0.50X** (since 100% - 50% = 50%).
- Ratio of the first number to the second number is:
- **0.83X : 0.50X**.
- Divide both numbers by **X**:
- **0.83 : 0.50**.
- Simplify by multiplying by 100:
- **83 : 50**.

Here are the options for clarity:
- Option 1: 59 : 35
- Option 2: 35 : 59
- Option 3: 50 : 83
- **Option 4: 83 : 50** ✅

**YOUR ANSWER IS RIGHT**