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Finding the Fourth Proportional to 67.32, 100.80 and 49.32

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Solution

The fourth proportional to 67.32, 100.80 and 49.32 is: 73.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.32 : 100.80 = 49.32 : x
  2. Step 2: Convert to fraction form
    67.32/100.80 = 49.32/x
  3. Step 3: Cross multiply
    67.32x = 100.80 × 49.32
  4. Step 4: Simplify right side
    67.32x = 4,971.46
  5. Step 5: Solve for x
    x = 4,971.46/67.32
  6. Step 6: Final answer
    x = 73.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.