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Finding the Fourth Proportional to 72.72, 100.10 and 62.92

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Solution

The fourth proportional to 72.72, 100.10 and 62.92 is: 86.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.72 : 100.10 = 62.92 : x
  2. Step 2: Convert to fraction form
    72.72/100.10 = 62.92/x
  3. Step 3: Cross multiply
    72.72x = 100.10 × 62.92
  4. Step 4: Simplify right side
    72.72x = 6,298.29
  5. Step 5: Solve for x
    x = 6,298.29/72.72
  6. Step 6: Final answer
    x = 86.61

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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.