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Finding the Fourth Proportional to 67.34, 100.98 and 38.43

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Solution

The fourth proportional to 67.34, 100.98 and 38.43 is: 57.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.34 : 100.98 = 38.43 : x
  2. Step 2: Convert to fraction form
    67.34/100.98 = 38.43/x
  3. Step 3: Cross multiply
    67.34x = 100.98 × 38.43
  4. Step 4: Simplify right side
    67.34x = 3,880.66
  5. Step 5: Solve for x
    x = 3,880.66/67.34
  6. Step 6: Final answer
    x = 57.63

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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.