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Finding the Fourth Proportional to 168.62, 232.78 and 103.16

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Solution

The fourth proportional to 168.62, 232.78 and 103.16 is: 142.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.62 : 232.78 = 103.16 : x
  2. Step 2: Convert to fraction form
    168.62/232.78 = 103.16/x
  3. Step 3: Cross multiply
    168.62x = 232.78 × 103.16
  4. Step 4: Simplify right side
    168.62x = 24,013.58
  5. Step 5: Solve for x
    x = 24,013.58/168.62
  6. Step 6: Final answer
    x = 142.41

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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.