Home / 86,279.20-129,418.80-82,515.40

Finding the Fourth Proportional to 86,279.20, 129,418.80 and 82,515.40

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Solution

The fourth proportional to 86,279.20, 129,418.80 and 82,515.40 is: 123,773.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,279.20 : 129,418.80 = 82,515.40 : x
  2. Step 2: Convert to fraction form
    86,279.20/129,418.80 = 82,515.40/x
  3. Step 3: Cross multiply
    86,279.20x = 129,418.80 × 82,515.40
  4. Step 4: Simplify right side
    86,279.20x = 10,679,044,049.52
  5. Step 5: Solve for x
    x = 10,679,044,049.52/86,279.20
  6. Step 6: Final answer
    x = 123,773.10

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1.5x scale

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.