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Finding the Fourth Proportional to 168.38, 232.37 and 129.30

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Solution

The fourth proportional to 168.38, 232.37 and 129.30 is: 178.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.38 : 232.37 = 129.30 : x
  2. Step 2: Convert to fraction form
    168.38/232.37 = 129.30/x
  3. Step 3: Cross multiply
    168.38x = 232.37 × 129.30
  4. Step 4: Simplify right side
    168.38x = 30,044.41
  5. Step 5: Solve for x
    x = 30,044.41/168.38
  6. Step 6: Final answer
    x = 178.43

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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.