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Finding the Fourth Proportional to 220,695.40, 331,043.10 and 80,458.60

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Solution

The fourth proportional to 220,695.40, 331,043.10 and 80,458.60 is: 120,687.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,695.40 : 331,043.10 = 80,458.60 : x
  2. Step 2: Convert to fraction form
    220,695.40/331,043.10 = 80,458.60/x
  3. Step 3: Cross multiply
    220,695.40x = 331,043.10 × 80,458.60
  4. Step 4: Simplify right side
    220,695.40x = 26,635,264,365.66
  5. Step 5: Solve for x
    x = 26,635,264,365.66/220,695.40
  6. Step 6: Final answer
    x = 120,687.90

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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.