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Finding the Fourth Proportional to 221,092.20, 331,662.60 and 80,881.20

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Solution

The fourth proportional to 221,092.20, 331,662.60 and 80,881.20 is: 121,330.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,092.20 : 331,662.60 = 80,881.20 : x
  2. Step 2: Convert to fraction form
    221,092.20/331,662.60 = 80,881.20/x
  3. Step 3: Cross multiply
    221,092.20x = 331,662.60 × 80,881.20
  4. Step 4: Simplify right side
    221,092.20x = 26,825,269,083.12
  5. Step 5: Solve for x
    x = 26,825,269,083.12/221,092.20
  6. Step 6: Final answer
    x = 121,330.69

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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.