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Finding the Fourth Proportional to 218,139.90, 327,209.85 and 218,139.90

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Solution

The fourth proportional to 218,139.90, 327,209.85 and 218,139.90 is: 327,209.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,139.90 : 327,209.85 = 218,139.90 : x
  2. Step 2: Convert to fraction form
    218,139.90/327,209.85 = 218,139.90/x
  3. Step 3: Cross multiply
    218,139.90x = 327,209.85 × 218,139.90
  4. Step 4: Simplify right side
    218,139.90x = 71,377,523,958.02
  5. Step 5: Solve for x
    x = 71,377,523,958.02/218,139.90
  6. Step 6: Final answer
    x = 327,209.85

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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.