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Finding the Fourth Proportional to 67.32, 100.80 and 50.18

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Solution

The fourth proportional to 67.32, 100.80 and 50.18 is: 75.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.32 : 100.80 = 50.18 : x
  2. Step 2: Convert to fraction form
    67.32/100.80 = 50.18/x
  3. Step 3: Cross multiply
    67.32x = 100.80 × 50.18
  4. Step 4: Simplify right side
    67.32x = 5,057.64
  5. Step 5: Solve for x
    x = 5,057.64/67.32
  6. Step 6: Final answer
    x = 75.13

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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.