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Finding the Fourth Proportional to 71,572.20, 107,358.30 and 67,489.80

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Solution

The fourth proportional to 71,572.20, 107,358.30 and 67,489.80 is: 101,234.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,572.20 : 107,358.30 = 67,489.80 : x
  2. Step 2: Convert to fraction form
    71,572.20/107,358.30 = 67,489.80/x
  3. Step 3: Cross multiply
    71,572.20x = 107,358.30 × 67,489.80
  4. Step 4: Simplify right side
    71,572.20x = 7,245,590,195.34
  5. Step 5: Solve for x
    x = 7,245,590,195.34/71,572.20
  6. Step 6: Final answer
    x = 101,234.70

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1.5x scale

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.