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Finding the Fourth Proportional to 207,449.96, 311,105.61 and 81,057.42

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Solution

The fourth proportional to 207,449.96, 311,105.61 and 81,057.42 is: 121,559.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,449.96 : 311,105.61 = 81,057.42 : x
  2. Step 2: Convert to fraction form
    207,449.96/311,105.61 = 81,057.42/x
  3. Step 3: Cross multiply
    207,449.96x = 311,105.61 × 81,057.42
  4. Step 4: Simplify right side
    207,449.96x = 25,217,418,094.13
  5. Step 5: Solve for x
    x = 25,217,418,094.13/207,449.96
  6. Step 6: Final answer
    x = 121,559.04

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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.