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Finding the Fourth Proportional to 278,763.68, 418,161.38 and 79,068.30

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Solution

The fourth proportional to 278,763.68, 418,161.38 and 79,068.30 is: 118,606.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,763.68 : 418,161.38 = 79,068.30 : x
  2. Step 2: Convert to fraction form
    278,763.68/418,161.38 = 79,068.30/x
  3. Step 3: Cross multiply
    278,763.68x = 418,161.38 × 79,068.30
  4. Step 4: Simplify right side
    278,763.68x = 33,063,309,046.91
  5. Step 5: Solve for x
    x = 33,063,309,046.91/278,763.68
  6. Step 6: Final answer
    x = 118,606.95

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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.