Home / 80,401.91-120,608.68-21,236.81

Finding the Fourth Proportional to 80,401.91, 120,608.68 and 21,236.81

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Solution

The fourth proportional to 80,401.91, 120,608.68 and 21,236.81 is: 31,856.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,401.91 : 120,608.68 = 21,236.81 : x
  2. Step 2: Convert to fraction form
    80,401.91/120,608.68 = 21,236.81/x
  3. Step 3: Cross multiply
    80,401.91x = 120,608.68 × 21,236.81
  4. Step 4: Simplify right side
    80,401.91x = 2,561,343,869.94
  5. Step 5: Solve for x
    x = 2,561,343,869.94/80,401.91
  6. Step 6: Final answer
    x = 31,856.75

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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.