Home / 78,732,138.40-118,098,207.60-72,992,575.60

Finding the Fourth Proportional to 78,732,138.40, 118,098,207.60 and 72,992,575.60

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Solution

The fourth proportional to 78,732,138.40, 118,098,207.60 and 72,992,575.60 is: 109,488,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,138.40 : 118,098,207.60 = 72,992,575.60 : x
  2. Step 2: Convert to fraction form
    78,732,138.40/118,098,207.60 = 72,992,575.60/x
  3. Step 3: Cross multiply
    78,732,138.40x = 118,098,207.60 × 72,992,575.60
  4. Step 4: Simplify right side
    78,732,138.40x = 8,620,292,346,467,493
  5. Step 5: Solve for x
    x = 8,620,292,346,467,493/78,732,138.40
  6. Step 6: Final answer
    x = 109,488,863.40

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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.