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Finding the Fourth Proportional to 220,645.80, 331,055.10 and 80,418.60

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Solution

The fourth proportional to 220,645.80, 331,055.10 and 80,418.60 is: 120,659.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,645.80 : 331,055.10 = 80,418.60 : x
  2. Step 2: Convert to fraction form
    220,645.80/331,055.10 = 80,418.60/x
  3. Step 3: Cross multiply
    220,645.80x = 331,055.10 × 80,418.60
  4. Step 4: Simplify right side
    220,645.80x = 26,622,987,664.86
  5. Step 5: Solve for x
    x = 26,622,987,664.86/220,645.80
  6. Step 6: Final answer
    x = 120,659.39

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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.