Home / 80,811.72-121,217.76-39,229.56

Finding the Fourth Proportional to 80,811.72, 121,217.76 and 39,229.56

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Solution

The fourth proportional to 80,811.72, 121,217.76 and 39,229.56 is: 58,844.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,811.72 : 121,217.76 = 39,229.56 : x
  2. Step 2: Convert to fraction form
    80,811.72/121,217.76 = 39,229.56/x
  3. Step 3: Cross multiply
    80,811.72x = 121,217.76 × 39,229.56
  4. Step 4: Simplify right side
    80,811.72x = 4,755,319,388.99
  5. Step 5: Solve for x
    x = 4,755,319,388.99/80,811.72
  6. Step 6: Final answer
    x = 58,844.43

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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.