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Finding the Fourth Proportional to 81,493.38, 122,256.47 and 28,906.97

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Solution

The fourth proportional to 81,493.38, 122,256.47 and 28,906.97 is: 43,366.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,493.38 : 122,256.47 = 28,906.97 : x
  2. Step 2: Convert to fraction form
    81,493.38/122,256.47 = 28,906.97/x
  3. Step 3: Cross multiply
    81,493.38x = 122,256.47 × 28,906.97
  4. Step 4: Simplify right side
    81,493.38x = 3,534,063,354.78
  5. Step 5: Solve for x
    x = 3,534,063,354.78/81,493.38
  6. Step 6: Final answer
    x = 43,366.26

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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.