Home / 80,731.91-121,096.86-28,141.22

Finding the Fourth Proportional to 80,731.91, 121,096.86 and 28,141.22

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Solution

The fourth proportional to 80,731.91, 121,096.86 and 28,141.22 is: 42,211.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,731.91 : 121,096.86 = 28,141.22 : x
  2. Step 2: Convert to fraction form
    80,731.91/121,096.86 = 28,141.22/x
  3. Step 3: Cross multiply
    80,731.91x = 121,096.86 × 28,141.22
  4. Step 4: Simplify right side
    80,731.91x = 3,407,813,378.57
  5. Step 5: Solve for x
    x = 3,407,813,378.57/80,731.91
  6. Step 6: Final answer
    x = 42,211.48

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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.