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Finding the Fourth Proportional to 80,112.17, 120,168.66 and 20,947.97

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Solution

The fourth proportional to 80,112.17, 120,168.66 and 20,947.97 is: 31,422.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,112.17 : 120,168.66 = 20,947.97 : x
  2. Step 2: Convert to fraction form
    80,112.17/120,168.66 = 20,947.97/x
  3. Step 3: Cross multiply
    80,112.17x = 120,168.66 × 20,947.97
  4. Step 4: Simplify right side
    80,112.17x = 2,517,289,131.83
  5. Step 5: Solve for x
    x = 2,517,289,131.83/80,112.17
  6. Step 6: Final answer
    x = 31,422.06

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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.