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Finding the Fourth Proportional to 80,610.54, 120,893.13 and 28,018.86

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Solution

The fourth proportional to 80,610.54, 120,893.13 and 28,018.86 is: 42,020.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,610.54 : 120,893.13 = 28,018.86 : x
  2. Step 2: Convert to fraction form
    80,610.54/120,893.13 = 28,018.86/x
  3. Step 3: Cross multiply
    80,610.54x = 120,893.13 × 28,018.86
  4. Step 4: Simplify right side
    80,610.54x = 3,387,287,684.43
  5. Step 5: Solve for x
    x = 3,387,287,684.43/80,610.54
  6. Step 6: Final answer
    x = 42,020.41

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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.