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Finding the Fourth Proportional to 72,663.38, 108,982.77 and 20,073.02

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Solution

The fourth proportional to 72,663.38, 108,982.77 and 20,073.02 is: 30,106.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,663.38 : 108,982.77 = 20,073.02 : x
  2. Step 2: Convert to fraction form
    72,663.38/108,982.77 = 20,073.02/x
  3. Step 3: Cross multiply
    72,663.38x = 108,982.77 × 20,073.02
  4. Step 4: Simplify right side
    72,663.38x = 2,187,612,701.68
  5. Step 5: Solve for x
    x = 2,187,612,701.68/72,663.38
  6. Step 6: Final answer
    x = 30,106.12

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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.