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Finding the Fourth Proportional to 278,708.01, 418,070.69 and 132,615.90

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Solution

The fourth proportional to 278,708.01, 418,070.69 and 132,615.90 is: 198,927.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,708.01 : 418,070.69 = 132,615.90 : x
  2. Step 2: Convert to fraction form
    278,708.01/418,070.69 = 132,615.90/x
  3. Step 3: Cross multiply
    278,708.01x = 418,070.69 × 132,615.90
  4. Step 4: Simplify right side
    278,708.01x = 55,442,820,817.97
  5. Step 5: Solve for x
    x = 55,442,820,817.97/278,708.01
  6. Step 6: Final answer
    x = 198,927.98

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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.