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Finding the Fourth Proportional to 166.20, 229.53 and 124.69

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Solution

The fourth proportional to 166.20, 229.53 and 124.69 is: 172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.20 : 229.53 = 124.69 : x
  2. Step 2: Convert to fraction form
    166.20/229.53 = 124.69/x
  3. Step 3: Cross multiply
    166.20x = 229.53 × 124.69
  4. Step 4: Simplify right side
    166.20x = 28,618.90
  5. Step 5: Solve for x
    x = 28,618.90/166.20
  6. Step 6: Final answer
    x = 172.20

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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.