Home / 207,387.20-311,138.40-89,115.20

Finding the Fourth Proportional to 207,387.20, 311,138.40 and 89,115.20

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Solution

The fourth proportional to 207,387.20, 311,138.40 and 89,115.20 is: 133,697.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,387.20 : 311,138.40 = 89,115.20 : x
  2. Step 2: Convert to fraction form
    207,387.20/311,138.40 = 89,115.20/x
  3. Step 3: Cross multiply
    207,387.20x = 311,138.40 × 89,115.20
  4. Step 4: Simplify right side
    207,387.20x = 27,727,160,743.68
  5. Step 5: Solve for x
    x = 27,727,160,743.68/207,387.20
  6. Step 6: Final answer
    x = 133,697.55

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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.