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Finding the Fourth Proportional to 220,616.43, 330,858.90 and 80,342.25

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Solution

The fourth proportional to 220,616.43, 330,858.90 and 80,342.25 is: 120,489.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,616.43 : 330,858.90 = 80,342.25 : x
  2. Step 2: Convert to fraction form
    220,616.43/330,858.90 = 80,342.25/x
  3. Step 3: Cross multiply
    220,616.43x = 330,858.90 × 80,342.25
  4. Step 4: Simplify right side
    220,616.43x = 26,581,948,458.53
  5. Step 5: Solve for x
    x = 26,581,948,458.53/220,616.43
  6. Step 6: Final answer
    x = 120,489.43

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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.