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Finding the Fourth Proportional to 67,305.90, 100,872.45 and 40,982.70

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Solution

The fourth proportional to 67,305.90, 100,872.45 and 40,982.70 is: 61,421.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,305.90 : 100,872.45 = 40,982.70 : x
  2. Step 2: Convert to fraction form
    67,305.90/100,872.45 = 40,982.70/x
  3. Step 3: Cross multiply
    67,305.90x = 100,872.45 × 40,982.70
  4. Step 4: Simplify right side
    67,305.90x = 4,134,025,356.62
  5. Step 5: Solve for x
    x = 4,134,025,356.62/67,305.90
  6. Step 6: Final answer
    x = 61,421.44

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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.