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Finding the Fourth Proportional to 218,601.10, 327,836.85 and 85,404.70

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Solution

The fourth proportional to 218,601.10, 327,836.85 and 85,404.70 is: 128,081.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,601.10 : 327,836.85 = 85,404.70 : x
  2. Step 2: Convert to fraction form
    218,601.10/327,836.85 = 85,404.70/x
  3. Step 3: Cross multiply
    218,601.10x = 327,836.85 × 85,404.70
  4. Step 4: Simplify right side
    218,601.10x = 27,998,807,823.20
  5. Step 5: Solve for x
    x = 27,998,807,823.20/218,601.10
  6. Step 6: Final answer
    x = 128,081.73

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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.