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Finding the Fourth Proportional to 79,481.60, 109,796.56 and 75,282.56

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Solution

The fourth proportional to 79,481.60, 109,796.56 and 75,282.56 is: 103,995.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,481.60 : 109,796.56 = 75,282.56 : x
  2. Step 2: Convert to fraction form
    79,481.60/109,796.56 = 75,282.56/x
  3. Step 3: Cross multiply
    79,481.60x = 109,796.56 × 75,282.56
  4. Step 4: Simplify right side
    79,481.60x = 8,265,766,115.99
  5. Step 5: Solve for x
    x = 8,265,766,115.99/79,481.60
  6. Step 6: Final answer
    x = 103,995.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.