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Finding the Fourth Proportional to 81,181, 121,799.22 and 43,744.96

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Solution

The fourth proportional to 81,181, 121,799.22 and 43,744.96 is: 65,632.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,181 : 121,799.22 = 43,744.96 : x
  2. Step 2: Convert to fraction form
    81,181/121,799.22 = 43,744.96/x
  3. Step 3: Cross multiply
    81,181x = 121,799.22 × 43,744.96
  4. Step 4: Simplify right side
    81,181x = 5,328,102,006.93
  5. Step 5: Solve for x
    x = 5,328,102,006.93/81,181
  6. Step 6: Final answer
    x = 65,632.38

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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.