Home / 100,614.24-138,836.46-80,463.78

Finding the Fourth Proportional to 100,614.24, 138,836.46 and 80,463.78

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Solution

The fourth proportional to 100,614.24, 138,836.46 and 80,463.78 is: 111,031.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,614.24 : 138,836.46 = 80,463.78 : x
  2. Step 2: Convert to fraction form
    100,614.24/138,836.46 = 80,463.78/x
  3. Step 3: Cross multiply
    100,614.24x = 138,836.46 × 80,463.78
  4. Step 4: Simplify right side
    100,614.24x = 11,171,306,373.42
  5. Step 5: Solve for x
    x = 11,171,306,373.42/100,614.24
  6. Step 6: Final answer
    x = 111,031.07

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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.