Home / 80,882.31-121,760.22-72,744.57

Finding the Fourth Proportional to 80,882.31, 121,760.22 and 72,744.57

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Solution

The fourth proportional to 80,882.31, 121,760.22 and 72,744.57 is: 109,509.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,882.31 : 121,760.22 = 72,744.57 : x
  2. Step 2: Convert to fraction form
    80,882.31/121,760.22 = 72,744.57/x
  3. Step 3: Cross multiply
    80,882.31x = 121,760.22 × 72,744.57
  4. Step 4: Simplify right side
    80,882.31x = 8,857,394,847.01
  5. Step 5: Solve for x
    x = 8,857,394,847.01/80,882.31
  6. Step 6: Final answer
    x = 109,509.67

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.