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Finding the Fourth Proportional to 71,919.42, 107,879.67 and 22,000.41

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Solution

The fourth proportional to 71,919.42, 107,879.67 and 22,000.41 is: 33,000.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,919.42 : 107,879.67 = 22,000.41 : x
  2. Step 2: Convert to fraction form
    71,919.42/107,879.67 = 22,000.41/x
  3. Step 3: Cross multiply
    71,919.42x = 107,879.67 × 22,000.41
  4. Step 4: Simplify right side
    71,919.42x = 2,373,396,970.66
  5. Step 5: Solve for x
    x = 2,373,396,970.66/71,919.42
  6. Step 6: Final answer
    x = 33,000.78

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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.