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Finding the Fourth Proportional to 87,489.90, 120,736.03 and 47,745.90

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Solution

The fourth proportional to 87,489.90, 120,736.03 and 47,745.90 is: 65,889.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,489.90 : 120,736.03 = 47,745.90 : x
  2. Step 2: Convert to fraction form
    87,489.90/120,736.03 = 47,745.90/x
  3. Step 3: Cross multiply
    87,489.90x = 120,736.03 × 47,745.90
  4. Step 4: Simplify right side
    87,489.90x = 5,764,650,414.78
  5. Step 5: Solve for x
    x = 5,764,650,414.78/87,489.90
  6. Step 6: Final answer
    x = 65,889.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.