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Finding the Fourth Proportional to 67,104.92, 100,620.12 and 27,688.70

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Solution

The fourth proportional to 67,104.92, 100,620.12 and 27,688.70 is: 41,517.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,104.92 : 100,620.12 = 27,688.70 : x
  2. Step 2: Convert to fraction form
    67,104.92/100,620.12 = 27,688.70/x
  3. Step 3: Cross multiply
    67,104.92x = 100,620.12 × 27,688.70
  4. Step 4: Simplify right side
    67,104.92x = 2,786,040,316.64
  5. Step 5: Solve for x
    x = 2,786,040,316.64/67,104.92
  6. Step 6: Final answer
    x = 41,517.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.