Home / 67,139.20-100,781.70-42,207.40

Finding the Fourth Proportional to 67,139.20, 100,781.70 and 42,207.40

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Solution

The fourth proportional to 67,139.20, 100,781.70 and 42,207.40 is: 63,356.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,139.20 : 100,781.70 = 42,207.40 : x
  2. Step 2: Convert to fraction form
    67,139.20/100,781.70 = 42,207.40/x
  3. Step 3: Cross multiply
    67,139.20x = 100,781.70 × 42,207.40
  4. Step 4: Simplify right side
    67,139.20x = 4,253,733,524.58
  5. Step 5: Solve for x
    x = 4,253,733,524.58/67,139.20
  6. Step 6: Final answer
    x = 63,356.93

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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.