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Finding the Fourth Proportional to 185,717.40, 278,543.70 and 67,327.80

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Solution

The fourth proportional to 185,717.40, 278,543.70 and 67,327.80 is: 100,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,717.40 : 278,543.70 = 67,327.80 : x
  2. Step 2: Convert to fraction form
    185,717.40/278,543.70 = 67,327.80/x
  3. Step 3: Cross multiply
    185,717.40x = 278,543.70 × 67,327.80
  4. Step 4: Simplify right side
    185,717.40x = 18,753,734,524.86
  5. Step 5: Solve for x
    x = 18,753,734,524.86/185,717.40
  6. Step 6: Final answer
    x = 100,979.95

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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.