Home / 91,718.90-137,319.15-82,387.70

Finding the Fourth Proportional to 91,718.90, 137,319.15 and 82,387.70

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Solution

The fourth proportional to 91,718.90, 137,319.15 and 82,387.70 is: 123,348.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,718.90 : 137,319.15 = 82,387.70 : x
  2. Step 2: Convert to fraction form
    91,718.90/137,319.15 = 82,387.70/x
  3. Step 3: Cross multiply
    91,718.90x = 137,319.15 × 82,387.70
  4. Step 4: Simplify right side
    91,718.90x = 11,313,408,934.46
  5. Step 5: Solve for x
    x = 11,313,408,934.46/91,718.90
  6. Step 6: Final answer
    x = 123,348.72

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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.