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Finding the Fourth Proportional to 109.52, 151.13 and 62.90

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Solution

The fourth proportional to 109.52, 151.13 and 62.90 is: 86.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.52 : 151.13 = 62.90 : x
  2. Step 2: Convert to fraction form
    109.52/151.13 = 62.90/x
  3. Step 3: Cross multiply
    109.52x = 151.13 × 62.90
  4. Step 4: Simplify right side
    109.52x = 9,505.76
  5. Step 5: Solve for x
    x = 9,505.76/109.52
  6. Step 6: Final answer
    x = 86.79

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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.