Home / 78,732,129.60-118,098,194.40-72,496,555.20

Finding the Fourth Proportional to 78,732,129.60, 118,098,194.40 and 72,496,555.20

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Solution

The fourth proportional to 78,732,129.60, 118,098,194.40 and 72,496,555.20 is: 108,744,832.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,732,129.60 : 118,098,194.40 = 72,496,555.20 : x
  2. Step 2: Convert to fraction form
    78,732,129.60/118,098,194.40 = 72,496,555.20/x
  3. Step 3: Cross multiply
    78,732,129.60x = 118,098,194.40 × 72,496,555.20
  4. Step 4: Simplify right side
    78,732,129.60x = 8,561,712,269,339,932
  5. Step 5: Solve for x
    x = 8,561,712,269,339,932/78,732,129.60
  6. Step 6: Final answer
    x = 108,744,832.80

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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.