Home / 80,153.75-120,227.22-20,988.11

Finding the Fourth Proportional to 80,153.75, 120,227.22 and 20,988.11

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Solution

The fourth proportional to 80,153.75, 120,227.22 and 20,988.11 is: 31,481.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,153.75 : 120,227.22 = 20,988.11 : x
  2. Step 2: Convert to fraction form
    80,153.75/120,227.22 = 20,988.11/x
  3. Step 3: Cross multiply
    80,153.75x = 120,227.22 × 20,988.11
  4. Step 4: Simplify right side
    80,153.75x = 2,523,342,418.92
  5. Step 5: Solve for x
    x = 2,523,342,418.92/80,153.75
  6. Step 6: Final answer
    x = 31,481.28

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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.