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Finding the Fourth Proportional to 181,540.80, 272,181.60 and 81,619.20

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Solution

The fourth proportional to 181,540.80, 272,181.60 and 81,619.20 is: 122,370.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,540.80 : 272,181.60 = 81,619.20 : x
  2. Step 2: Convert to fraction form
    181,540.80/272,181.60 = 81,619.20/x
  3. Step 3: Cross multiply
    181,540.80x = 272,181.60 × 81,619.20
  4. Step 4: Simplify right side
    181,540.80x = 22,215,244,446.72
  5. Step 5: Solve for x
    x = 22,215,244,446.72/181,540.80
  6. Step 6: Final answer
    x = 122,370.53

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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.