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Finding the Fourth Proportional to 73,691.28, 110,540.40 and 21,108.48

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Solution

The fourth proportional to 73,691.28, 110,540.40 and 21,108.48 is: 31,663.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,691.28 : 110,540.40 = 21,108.48 : x
  2. Step 2: Convert to fraction form
    73,691.28/110,540.40 = 21,108.48/x
  3. Step 3: Cross multiply
    73,691.28x = 110,540.40 × 21,108.48
  4. Step 4: Simplify right side
    73,691.28x = 2,333,339,822.59
  5. Step 5: Solve for x
    x = 2,333,339,822.59/73,691.28
  6. Step 6: Final answer
    x = 31,663.72

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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.