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Finding the Fourth Proportional to 92.42, 127.50 and 62.91

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Solution

The fourth proportional to 92.42, 127.50 and 62.91 is: 86.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    92.42 : 127.50 = 62.91 : x
  2. Step 2: Convert to fraction form
    92.42/127.50 = 62.91/x
  3. Step 3: Cross multiply
    92.42x = 127.50 × 62.91
  4. Step 4: Simplify right side
    92.42x = 8,020.97
  5. Step 5: Solve for x
    x = 8,020.97/92.42
  6. Step 6: Final answer
    x = 86.78

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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.