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Finding the Fourth Proportional to 181,387.20, 272,080.80 and 131,620.80

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Solution

The fourth proportional to 181,387.20, 272,080.80 and 131,620.80 is: 197,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,387.20 : 272,080.80 = 131,620.80 : x
  2. Step 2: Convert to fraction form
    181,387.20/272,080.80 = 131,620.80/x
  3. Step 3: Cross multiply
    181,387.20x = 272,080.80 × 131,620.80
  4. Step 4: Simplify right side
    181,387.20x = 35,811,492,560.64
  5. Step 5: Solve for x
    x = 35,811,492,560.64/181,387.20
  6. Step 6: Final answer
    x = 197,431.20

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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.