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Finding the Fourth Proportional to 81,485.76, 122,227.65 and 22,321.38

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Solution

The fourth proportional to 81,485.76, 122,227.65 and 22,321.38 is: 33,481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,485.76 : 122,227.65 = 22,321.38 : x
  2. Step 2: Convert to fraction form
    81,485.76/122,227.65 = 22,321.38/x
  3. Step 3: Cross multiply
    81,485.76x = 122,227.65 × 22,321.38
  4. Step 4: Simplify right side
    81,485.76x = 2,728,289,822.16
  5. Step 5: Solve for x
    x = 2,728,289,822.16/81,485.76
  6. Step 6: Final answer
    x = 33,481.80

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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.