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Finding the Fourth Proportional to 181,342.80, 271,884.60 and 81,421.20

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Solution

The fourth proportional to 181,342.80, 271,884.60 and 81,421.20 is: 122,073.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,342.80 : 271,884.60 = 81,421.20 : x
  2. Step 2: Convert to fraction form
    181,342.80/271,884.60 = 81,421.20/x
  3. Step 3: Cross multiply
    181,342.80x = 271,884.60 × 81,421.20
  4. Step 4: Simplify right side
    181,342.80x = 22,137,170,393.52
  5. Step 5: Solve for x
    x = 22,137,170,393.52/181,342.80
  6. Step 6: Final answer
    x = 122,073.61

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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.