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Finding the Fourth Proportional to 81,447.96, 122,086.68 and 34,090.20

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Solution

The fourth proportional to 81,447.96, 122,086.68 and 34,090.20 is: 51,099.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,447.96 : 122,086.68 = 34,090.20 : x
  2. Step 2: Convert to fraction form
    81,447.96/122,086.68 = 34,090.20/x
  3. Step 3: Cross multiply
    81,447.96x = 122,086.68 × 34,090.20
  4. Step 4: Simplify right side
    81,447.96x = 4,161,959,338.54
  5. Step 5: Solve for x
    x = 4,161,959,338.54/81,447.96
  6. Step 6: Final answer
    x = 51,099.61

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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.