Home / 72,786.48-109,179.11-20,195.97

Finding the Fourth Proportional to 72,786.48, 109,179.11 and 20,195.97

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Solution

The fourth proportional to 72,786.48, 109,179.11 and 20,195.97 is: 30,293.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,786.48 : 109,179.11 = 20,195.97 : x
  2. Step 2: Convert to fraction form
    72,786.48/109,179.11 = 20,195.97/x
  3. Step 3: Cross multiply
    72,786.48x = 109,179.11 × 20,195.97
  4. Step 4: Simplify right side
    72,786.48x = 2,204,977,929.21
  5. Step 5: Solve for x
    x = 2,204,977,929.21/72,786.48
  6. Step 6: Final answer
    x = 30,293.78

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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.