Home / 78,732,138.60-118,098,207.90-72,992,575.80

Finding the Fourth Proportional to 78,732,138.60, 118,098,207.90 and 72,992,575.80

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Solution

The fourth proportional to 78,732,138.60, 118,098,207.90 and 72,992,575.80 is: 109,488,863.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,138.60 : 118,098,207.90 = 72,992,575.80 : x
  2. Step 2: Convert to fraction form
    78,732,138.60/118,098,207.90 = 72,992,575.80/x
  3. Step 3: Cross multiply
    78,732,138.60x = 118,098,207.90 × 72,992,575.80
  4. Step 4: Simplify right side
    78,732,138.60x = 8,620,292,391,984,909
  5. Step 5: Solve for x
    x = 8,620,292,391,984,909/78,732,138.60
  6. Step 6: Final answer
    x = 109,488,863.70

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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.