Home / 100,190.30-138,229.05-57,747.92

Finding the Fourth Proportional to 100,190.30, 138,229.05 and 57,747.92

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Solution

The fourth proportional to 100,190.30, 138,229.05 and 57,747.92 is: 79,672.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,190.30 : 138,229.05 = 57,747.92 : x
  2. Step 2: Convert to fraction form
    100,190.30/138,229.05 = 57,747.92/x
  3. Step 3: Cross multiply
    100,190.30x = 138,229.05 × 57,747.92
  4. Step 4: Simplify right side
    100,190.30x = 7,982,440,121.08
  5. Step 5: Solve for x
    x = 7,982,440,121.08/100,190.30
  6. Step 6: Final answer
    x = 79,672.78

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1.5x scale

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.