Home / 80,872.32-121,343.76-28,319.52

Finding the Fourth Proportional to 80,872.32, 121,343.76 and 28,319.52

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Solution

The fourth proportional to 80,872.32, 121,343.76 and 28,319.52 is: 42,491.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,872.32 : 121,343.76 = 28,319.52 : x
  2. Step 2: Convert to fraction form
    80,872.32/121,343.76 = 28,319.52/x
  3. Step 3: Cross multiply
    80,872.32x = 121,343.76 × 28,319.52
  4. Step 4: Simplify right side
    80,872.32x = 3,436,397,038.20
  5. Step 5: Solve for x
    x = 3,436,397,038.20/80,872.32
  6. Step 6: Final answer
    x = 42,491.63

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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.