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Finding the Fourth Proportional to 166.57, 229.66 and 129.67

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Solution

The fourth proportional to 166.57, 229.66 and 129.67 is: 178.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.57 : 229.66 = 129.67 : x
  2. Step 2: Convert to fraction form
    166.57/229.66 = 129.67/x
  3. Step 3: Cross multiply
    166.57x = 229.66 × 129.67
  4. Step 4: Simplify right side
    166.57x = 29,780.01
  5. Step 5: Solve for x
    x = 29,780.01/166.57
  6. Step 6: Final answer
    x = 178.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.