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Finding the Fourth Proportional to 82,150.80, 123,080.40 and 67,279.20

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Solution

The fourth proportional to 82,150.80, 123,080.40 and 67,279.20 is: 100,799.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,150.80 : 123,080.40 = 67,279.20 : x
  2. Step 2: Convert to fraction form
    82,150.80/123,080.40 = 67,279.20/x
  3. Step 3: Cross multiply
    82,150.80x = 123,080.40 × 67,279.20
  4. Step 4: Simplify right side
    82,150.80x = 8,280,750,847.68
  5. Step 5: Solve for x
    x = 8,280,750,847.68/82,150.80
  6. Step 6: Final answer
    x = 100,799.39

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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.