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Finding the Fourth Proportional to 67.62, 100.92 and 61.59

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Solution

The fourth proportional to 67.62, 100.92 and 61.59 is: 91.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.62 : 100.92 = 61.59 : x
  2. Step 2: Convert to fraction form
    67.62/100.92 = 61.59/x
  3. Step 3: Cross multiply
    67.62x = 100.92 × 61.59
  4. Step 4: Simplify right side
    67.62x = 6,215.66
  5. Step 5: Solve for x
    x = 6,215.66/67.62
  6. Step 6: Final answer
    x = 91.92

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.