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Finding the Fourth Proportional to 220,276.80, 330,544.80 and 80,017.20

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Solution

The fourth proportional to 220,276.80, 330,544.80 and 80,017.20 is: 120,072.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,276.80 : 330,544.80 = 80,017.20 : x
  2. Step 2: Convert to fraction form
    220,276.80/330,544.80 = 80,017.20/x
  3. Step 3: Cross multiply
    220,276.80x = 330,544.80 × 80,017.20
  4. Step 4: Simplify right side
    220,276.80x = 26,449,269,370.56
  5. Step 5: Solve for x
    x = 26,449,269,370.56/220,276.80
  6. Step 6: Final answer
    x = 120,072.88

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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.