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Finding the Fourth Proportional to 81,362.18, 122,061.68 and 43,921.46

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Solution

The fourth proportional to 81,362.18, 122,061.68 and 43,921.46 is: 65,892.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,362.18 : 122,061.68 = 43,921.46 : x
  2. Step 2: Convert to fraction form
    81,362.18/122,061.68 = 43,921.46/x
  3. Step 3: Cross multiply
    81,362.18x = 122,061.68 × 43,921.46
  4. Step 4: Simplify right side
    81,362.18x = 5,361,127,195.65
  5. Step 5: Solve for x
    x = 5,361,127,195.65/81,362.18
  6. Step 6: Final answer
    x = 65,892.13

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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.