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Finding the Fourth Proportional to 168.92, 232.71 and 139.22

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Solution

The fourth proportional to 168.92, 232.71 and 139.22 is: 191.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.92 : 232.71 = 139.22 : x
  2. Step 2: Convert to fraction form
    168.92/232.71 = 139.22/x
  3. Step 3: Cross multiply
    168.92x = 232.71 × 139.22
  4. Step 4: Simplify right side
    168.92x = 32,397.89
  5. Step 5: Solve for x
    x = 32,397.89/168.92
  6. Step 6: Final answer
    x = 191.79

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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.