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Finding the Fourth Proportional to 80,589, 120,887.82 and 25,189.32

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Solution

The fourth proportional to 80,589, 120,887.82 and 25,189.32 is: 37,785.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,589 : 120,887.82 = 25,189.32 : x
  2. Step 2: Convert to fraction form
    80,589/120,887.82 = 25,189.32/x
  3. Step 3: Cross multiply
    80,589x = 120,887.82 × 25,189.32
  4. Step 4: Simplify right side
    80,589x = 3,045,081,982.08
  5. Step 5: Solve for x
    x = 3,045,081,982.08/80,589
  6. Step 6: Final answer
    x = 37,785.33

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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.