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Finding the Fourth Proportional to 220,105.20, 330,157.80 and 79,845.60

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Solution

The fourth proportional to 220,105.20, 330,157.80 and 79,845.60 is: 119,768.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,105.20 : 330,157.80 = 79,845.60 : x
  2. Step 2: Convert to fraction form
    220,105.20/330,157.80 = 79,845.60/x
  3. Step 3: Cross multiply
    220,105.20x = 330,157.80 × 79,845.60
  4. Step 4: Simplify right side
    220,105.20x = 26,361,647,635.68
  5. Step 5: Solve for x
    x = 26,361,647,635.68/220,105.20
  6. Step 6: Final answer
    x = 119,768.40

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1.5x scale

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.