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Finding the Fourth Proportional to 278,799.93, 418,208.10 and 68,437.89

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Solution

The fourth proportional to 278,799.93, 418,208.10 and 68,437.89 is: 102,658.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,799.93 : 418,208.10 = 68,437.89 : x
  2. Step 2: Convert to fraction form
    278,799.93/418,208.10 = 68,437.89/x
  3. Step 3: Cross multiply
    278,799.93x = 418,208.10 × 68,437.89
  4. Step 4: Simplify right side
    278,799.93x = 28,621,279,944.91
  5. Step 5: Solve for x
    x = 28,621,279,944.91/278,799.93
  6. Step 6: Final answer
    x = 102,658.85

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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.