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Finding the Fourth Proportional to 71,770.72, 107,489.12 and 69,279.04

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Solution

The fourth proportional to 71,770.72, 107,489.12 and 69,279.04 is: 103,757.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,770.72 : 107,489.12 = 69,279.04 : x
  2. Step 2: Convert to fraction form
    71,770.72/107,489.12 = 69,279.04/x
  3. Step 3: Cross multiply
    71,770.72x = 107,489.12 × 69,279.04
  4. Step 4: Simplify right side
    71,770.72x = 7,446,743,044.04
  5. Step 5: Solve for x
    x = 7,446,743,044.04/71,770.72
  6. Step 6: Final answer
    x = 103,757.40

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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.