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Finding the Fourth Proportional to 67.56, 93.21 and 38.43

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Solution

The fourth proportional to 67.56, 93.21 and 38.43 is: 53.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.56 : 93.21 = 38.43 : x
  2. Step 2: Convert to fraction form
    67.56/93.21 = 38.43/x
  3. Step 3: Cross multiply
    67.56x = 93.21 × 38.43
  4. Step 4: Simplify right side
    67.56x = 3,582.06
  5. Step 5: Solve for x
    x = 3,582.06/67.56
  6. Step 6: Final answer
    x = 53.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.