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Finding the Fourth Proportional to 168,791,609.80, 253,027,982.40 and 99,757,423.90

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Solution

The fourth proportional to 168,791,609.80, 253,027,982.40 and 99,757,423.90 is: 149,541,909.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,791,609.80 : 253,027,982.40 = 99,757,423.90 : x
  2. Step 2: Convert to fraction form
    168,791,609.80/253,027,982.40 = 99,757,423.90/x
  3. Step 3: Cross multiply
    168,791,609.80x = 253,027,982.40 × 99,757,423.90
  4. Step 4: Simplify right side
    168,791,609.80x = 25,241,419,698,838,540
  5. Step 5: Solve for x
    x = 25,241,419,698,838,540/168,791,609.80
  6. Step 6: Final answer
    x = 149,541,909.87

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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.