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Finding the Fourth Proportional to 278,369.92, 417,554.88 and 81,377.92

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Solution

The fourth proportional to 278,369.92, 417,554.88 and 81,377.92 is: 122,066.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,369.92 : 417,554.88 = 81,377.92 : x
  2. Step 2: Convert to fraction form
    278,369.92/417,554.88 = 81,377.92/x
  3. Step 3: Cross multiply
    278,369.92x = 417,554.88 × 81,377.92
  4. Step 4: Simplify right side
    278,369.92x = 33,979,747,620.25
  5. Step 5: Solve for x
    x = 33,979,747,620.25/278,369.92
  6. Step 6: Final answer
    x = 122,066.88

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1.5x scale

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.