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Finding the Fourth Proportional to 80,561.75, 120,842.67 and 30,630.31

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Solution

The fourth proportional to 80,561.75, 120,842.67 and 30,630.31 is: 45,945.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,561.75 : 120,842.67 = 30,630.31 : x
  2. Step 2: Convert to fraction form
    80,561.75/120,842.67 = 30,630.31/x
  3. Step 3: Cross multiply
    80,561.75x = 120,842.67 × 30,630.31
  4. Step 4: Simplify right side
    80,561.75x = 3,701,448,709.24
  5. Step 5: Solve for x
    x = 3,701,448,709.24/80,561.75
  6. Step 6: Final answer
    x = 45,945.49

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Similar ratio
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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.