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Finding the Fourth Proportional to 278,718.01, 418,104.70 and 89,130.74

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Solution

The fourth proportional to 278,718.01, 418,104.70 and 89,130.74 is: 133,704.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,718.01 : 418,104.70 = 89,130.74 : x
  2. Step 2: Convert to fraction form
    278,718.01/418,104.70 = 89,130.74/x
  3. Step 3: Cross multiply
    278,718.01x = 418,104.70 × 89,130.74
  4. Step 4: Simplify right side
    278,718.01x = 37,265,981,308.48
  5. Step 5: Solve for x
    x = 37,265,981,308.48/278,718.01
  6. Step 6: Final answer
    x = 133,704.96

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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.