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Finding the Fourth Proportional to 221,091.80, 331,443.30 and 132,380.60

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Solution

The fourth proportional to 221,091.80, 331,443.30 and 132,380.60 is: 198,454.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,091.80 : 331,443.30 = 132,380.60 : x
  2. Step 2: Convert to fraction form
    221,091.80/331,443.30 = 132,380.60/x
  3. Step 3: Cross multiply
    221,091.80x = 331,443.30 × 132,380.60
  4. Step 4: Simplify right side
    221,091.80x = 43,876,662,919.98
  5. Step 5: Solve for x
    x = 43,876,662,919.98/221,091.80
  6. Step 6: Final answer
    x = 198,454.50

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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.