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Finding the Fourth Proportional to 72,672.50, 108,996.15 and 20,067.86

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Solution

The fourth proportional to 72,672.50, 108,996.15 and 20,067.86 is: 30,098.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,672.50 : 108,996.15 = 20,067.86 : x
  2. Step 2: Convert to fraction form
    72,672.50/108,996.15 = 20,067.86/x
  3. Step 3: Cross multiply
    72,672.50x = 108,996.15 × 20,067.86
  4. Step 4: Simplify right side
    72,672.50x = 2,187,319,478.74
  5. Step 5: Solve for x
    x = 2,187,319,478.74/72,672.50
  6. Step 6: Final answer
    x = 30,098.31

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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.