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Finding the Fourth Proportional to 109.57, 151.16 and 62.92

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Solution

The fourth proportional to 109.57, 151.16 and 62.92 is: 86.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109.57 : 151.16 = 62.92 : x
  2. Step 2: Convert to fraction form
    109.57/151.16 = 62.92/x
  3. Step 3: Cross multiply
    109.57x = 151.16 × 62.92
  4. Step 4: Simplify right side
    109.57x = 9,510.77
  5. Step 5: Solve for x
    x = 9,510.77/109.57
  6. Step 6: Final answer
    x = 86.80

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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.