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Finding the Fourth Proportional to 154,031.20, 231,046.80 and 131,480.80

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Solution

The fourth proportional to 154,031.20, 231,046.80 and 131,480.80 is: 197,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,031.20 : 231,046.80 = 131,480.80 : x
  2. Step 2: Convert to fraction form
    154,031.20/231,046.80 = 131,480.80/x
  3. Step 3: Cross multiply
    154,031.20x = 231,046.80 × 131,480.80
  4. Step 4: Simplify right side
    154,031.20x = 30,378,218,101.44
  5. Step 5: Solve for x
    x = 30,378,218,101.44/154,031.20
  6. Step 6: Final answer
    x = 197,221.20

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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.