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Finding the Fourth Proportional to 278,843.95, 418,267.32 and 68,481.91

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Solution

The fourth proportional to 278,843.95, 418,267.32 and 68,481.91 is: 102,723.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,843.95 : 418,267.32 = 68,481.91 : x
  2. Step 2: Convert to fraction form
    278,843.95/418,267.32 = 68,481.91/x
  3. Step 3: Cross multiply
    278,843.95x = 418,267.32 × 68,481.91
  4. Step 4: Simplify right side
    278,843.95x = 28,643,744,964.18
  5. Step 5: Solve for x
    x = 28,643,744,964.18/278,843.95
  6. Step 6: Final answer
    x = 102,723.21

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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.