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Finding the Fourth Proportional to 82,891.20, 124,190.40 and 80,150.40

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Solution

The fourth proportional to 82,891.20, 124,190.40 and 80,150.40 is: 120,084.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,891.20 : 124,190.40 = 80,150.40 : x
  2. Step 2: Convert to fraction form
    82,891.20/124,190.40 = 80,150.40/x
  3. Step 3: Cross multiply
    82,891.20x = 124,190.40 × 80,150.40
  4. Step 4: Simplify right side
    82,891.20x = 9,953,910,236.16
  5. Step 5: Solve for x
    x = 9,953,910,236.16/82,891.20
  6. Step 6: Final answer
    x = 120,084.04

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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.