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Finding the Fourth Proportional to 80,371.96, 120,441.30 and 45,236.60

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Solution

The fourth proportional to 80,371.96, 120,441.30 and 45,236.60 is: 67,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,371.96 : 120,441.30 = 45,236.60 : x
  2. Step 2: Convert to fraction form
    80,371.96/120,441.30 = 45,236.60/x
  3. Step 3: Cross multiply
    80,371.96x = 120,441.30 × 45,236.60
  4. Step 4: Simplify right side
    80,371.96x = 5,448,354,911.58
  5. Step 5: Solve for x
    x = 5,448,354,911.58/80,371.96
  6. Step 6: Final answer
    x = 67,789.25

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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.