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Finding the Fourth Proportional to 220,445.12, 330,815.14 and 80,203.75

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Solution

The fourth proportional to 220,445.12, 330,815.14 and 80,203.75 is: 120,359.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,445.12 : 330,815.14 = 80,203.75 : x
  2. Step 2: Convert to fraction form
    220,445.12/330,815.14 = 80,203.75/x
  3. Step 3: Cross multiply
    220,445.12x = 330,815.14 × 80,203.75
  4. Step 4: Simplify right side
    220,445.12x = 26,532,613,757.23
  5. Step 5: Solve for x
    x = 26,532,613,757.23/220,445.12
  6. Step 6: Final answer
    x = 120,359.27

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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.