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Finding the Fourth Proportional to 84,218,139.70, 126,327,209.55 and 84,218,139.70

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Solution

The fourth proportional to 84,218,139.70, 126,327,209.55 and 84,218,139.70 is: 126,327,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,218,139.70 : 126,327,209.55 = 84,218,139.70 : x
  2. Step 2: Convert to fraction form
    84,218,139.70/126,327,209.55 = 84,218,139.70/x
  3. Step 3: Cross multiply
    84,218,139.70x = 126,327,209.55 × 84,218,139.70
  4. Step 4: Simplify right side
    84,218,139.70x = 10,639,042,581,793,074
  5. Step 5: Solve for x
    x = 10,639,042,581,793,074/84,218,139.70
  6. Step 6: Final answer
    x = 126,327,209.55

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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.