Home / 135,446.23-186,917.17-81,720.86

Finding the Fourth Proportional to 135,446.23, 186,917.17 and 81,720.86

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Solution

The fourth proportional to 135,446.23, 186,917.17 and 81,720.86 is: 112,775.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,446.23 : 186,917.17 = 81,720.86 : x
  2. Step 2: Convert to fraction form
    135,446.23/186,917.17 = 81,720.86/x
  3. Step 3: Cross multiply
    135,446.23x = 186,917.17 × 81,720.86
  4. Step 4: Simplify right side
    135,446.23x = 15,275,031,472.56
  5. Step 5: Solve for x
    x = 15,275,031,472.56/135,446.23
  6. Step 6: Final answer
    x = 112,775.62

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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.