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Finding the Fourth Proportional to 80.71, 121.17 and 50.18

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Solution

The fourth proportional to 80.71, 121.17 and 50.18 is: 75.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    80.71 : 121.17 = 50.18 : x
  2. Step 2: Convert to fraction form
    80.71/121.17 = 50.18/x
  3. Step 3: Cross multiply
    80.71x = 121.17 × 50.18
  4. Step 4: Simplify right side
    80.71x = 6,080.31
  5. Step 5: Solve for x
    x = 6,080.31/80.71
  6. Step 6: Final answer
    x = 75.34

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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.