Home / 278,691.21-418,147.61-89,180.78

Finding the Fourth Proportional to 278,691.21, 418,147.61 and 89,180.78

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Solution

The fourth proportional to 278,691.21, 418,147.61 and 89,180.78 is: 133,806.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,691.21 : 418,147.61 = 89,180.78 : x
  2. Step 2: Convert to fraction form
    278,691.21/418,147.61 = 89,180.78/x
  3. Step 3: Cross multiply
    278,691.21x = 418,147.61 × 89,180.78
  4. Step 4: Simplify right side
    278,691.21x = 37,290,727,478.29
  5. Step 5: Solve for x
    x = 37,290,727,478.29/278,691.21
  6. Step 6: Final answer
    x = 133,806.62

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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.