Home / 107,609.11-161,380.76-86,499.09

Finding the Fourth Proportional to 107,609.11, 161,380.76 and 86,499.09

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Solution

The fourth proportional to 107,609.11, 161,380.76 and 86,499.09 is: 129,722.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,609.11 : 161,380.76 = 86,499.09 : x
  2. Step 2: Convert to fraction form
    107,609.11/161,380.76 = 86,499.09/x
  3. Step 3: Cross multiply
    107,609.11x = 161,380.76 × 86,499.09
  4. Step 4: Simplify right side
    107,609.11x = 13,959,288,451.01
  5. Step 5: Solve for x
    x = 13,959,288,451.01/107,609.11
  6. Step 6: Final answer
    x = 129,722.18

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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.