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Finding the Fourth Proportional to 220,439.80, 330,746.10 and 80,212.60

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Solution

The fourth proportional to 220,439.80, 330,746.10 and 80,212.60 is: 120,350.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,439.80 : 330,746.10 = 80,212.60 : x
  2. Step 2: Convert to fraction form
    220,439.80/330,746.10 = 80,212.60/x
  3. Step 3: Cross multiply
    220,439.80x = 330,746.10 × 80,212.60
  4. Step 4: Simplify right side
    220,439.80x = 26,530,004,620.86
  5. Step 5: Solve for x
    x = 26,530,004,620.86/220,439.80
  6. Step 6: Final answer
    x = 120,350.34

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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.