Home / 80,401.66-120,608.30-21,236.56

Finding the Fourth Proportional to 80,401.66, 120,608.30 and 21,236.56

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Solution

The fourth proportional to 80,401.66, 120,608.30 and 21,236.56 is: 31,856.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,401.66 : 120,608.30 = 21,236.56 : x
  2. Step 2: Convert to fraction form
    80,401.66/120,608.30 = 21,236.56/x
  3. Step 3: Cross multiply
    80,401.66x = 120,608.30 × 21,236.56
  4. Step 4: Simplify right side
    80,401.66x = 2,561,305,700.97
  5. Step 5: Solve for x
    x = 2,561,305,700.97/80,401.66
  6. Step 6: Final answer
    x = 31,856.38

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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.