Home / 80,919.78-121,379.46-21,755.44

Finding the Fourth Proportional to 80,919.78, 121,379.46 and 21,755.44

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Solution

The fourth proportional to 80,919.78, 121,379.46 and 21,755.44 is: 32,633.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,919.78 : 121,379.46 = 21,755.44 : x
  2. Step 2: Convert to fraction form
    80,919.78/121,379.46 = 21,755.44/x
  3. Step 3: Cross multiply
    80,919.78x = 121,379.46 × 21,755.44
  4. Step 4: Simplify right side
    80,919.78x = 2,640,663,559.26
  5. Step 5: Solve for x
    x = 2,640,663,559.26/80,919.78
  6. Step 6: Final answer
    x = 32,633.10

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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.