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Finding the Fourth Proportional to 82,718,793.90, 123,839,042.40 and 80,327,309.40

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Solution

The fourth proportional to 82,718,793.90, 123,839,042.40 and 80,327,309.40 is: 120,258,729.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,718,793.90 : 123,839,042.40 = 80,327,309.40 : x
  2. Step 2: Convert to fraction form
    82,718,793.90/123,839,042.40 = 80,327,309.40/x
  3. Step 3: Cross multiply
    82,718,793.90x = 123,839,042.40 × 80,327,309.40
  4. Step 4: Simplify right side
    82,718,793.90x = 9,947,657,074,664,520
  5. Step 5: Solve for x
    x = 9,947,657,074,664,520/82,718,793.90
  6. Step 6: Final answer
    x = 120,258,729.68

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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.