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Finding the Fourth Proportional to 278,760.66, 418,141.08 and 68,398.59

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Solution

The fourth proportional to 278,760.66, 418,141.08 and 68,398.59 is: 102,597.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,760.66 : 418,141.08 = 68,398.59 : x
  2. Step 2: Convert to fraction form
    278,760.66/418,141.08 = 68,398.59/x
  3. Step 3: Cross multiply
    278,760.66x = 418,141.08 × 68,398.59
  4. Step 4: Simplify right side
    278,760.66x = 28,600,260,293.08
  5. Step 5: Solve for x
    x = 28,600,260,293.08/278,760.66
  6. Step 6: Final answer
    x = 102,597.91

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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.