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Finding the Fourth Proportional to 278,881.56, 418,387.92 and 91,893

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Solution

The fourth proportional to 278,881.56, 418,387.92 and 91,893 is: 137,861.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,881.56 : 418,387.92 = 91,893 : x
  2. Step 2: Convert to fraction form
    278,881.56/418,387.92 = 91,893/x
  3. Step 3: Cross multiply
    278,881.56x = 418,387.92 × 91,893
  4. Step 4: Simplify right side
    278,881.56x = 38,446,921,132.56
  5. Step 5: Solve for x
    x = 38,446,921,132.56/278,881.56
  6. Step 6: Final answer
    x = 137,861.11

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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.