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Finding the Fourth Proportional to 278,793.99, 418,206.78 and 79,098.68

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Solution

The fourth proportional to 278,793.99, 418,206.78 and 79,098.68 is: 118,652.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,793.99 : 418,206.78 = 79,098.68 : x
  2. Step 2: Convert to fraction form
    278,793.99/418,206.78 = 79,098.68/x
  3. Step 3: Cross multiply
    278,793.99x = 418,206.78 × 79,098.68
  4. Step 4: Simplify right side
    278,793.99x = 33,079,605,310.57
  5. Step 5: Solve for x
    x = 33,079,605,310.57/278,793.99
  6. Step 6: Final answer
    x = 118,652.51

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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.