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Finding the Fourth Proportional to 81,390.29, 122,076.05 and 22,230.72

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Solution

The fourth proportional to 81,390.29, 122,076.05 and 22,230.72 is: 33,343.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,390.29 : 122,076.05 = 22,230.72 : x
  2. Step 2: Convert to fraction form
    81,390.29/122,076.05 = 22,230.72/x
  3. Step 3: Cross multiply
    81,390.29x = 122,076.05 × 22,230.72
  4. Step 4: Simplify right side
    81,390.29x = 2,713,838,375.10
  5. Step 5: Solve for x
    x = 2,713,838,375.10/81,390.29
  6. Step 6: Final answer
    x = 33,343.52

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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.