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Finding the Fourth Proportional to 81,728.75, 122,600.17 and 22,564.43

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Solution

The fourth proportional to 81,728.75, 122,600.17 and 22,564.43 is: 33,848.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,728.75 : 122,600.17 = 22,564.43 : x
  2. Step 2: Convert to fraction form
    81,728.75/122,600.17 = 22,564.43/x
  3. Step 3: Cross multiply
    81,728.75x = 122,600.17 × 22,564.43
  4. Step 4: Simplify right side
    81,728.75x = 2,766,402,953.95
  5. Step 5: Solve for x
    x = 2,766,402,953.95/81,728.75
  6. Step 6: Final answer
    x = 33,848.59

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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.