Home / 71,986.20-107,930.70-38,257.80

Finding the Fourth Proportional to 71,986.20, 107,930.70 and 38,257.80

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Solution

The fourth proportional to 71,986.20, 107,930.70 and 38,257.80 is: 57,360.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,986.20 : 107,930.70 = 38,257.80 : x
  2. Step 2: Convert to fraction form
    71,986.20/107,930.70 = 38,257.80/x
  3. Step 3: Cross multiply
    71,986.20x = 107,930.70 × 38,257.80
  4. Step 4: Simplify right side
    71,986.20x = 4,129,191,134.46
  5. Step 5: Solve for x
    x = 4,129,191,134.46/71,986.20
  6. Step 6: Final answer
    x = 57,360.87

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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.