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Finding the Fourth Proportional to 67.71, 101.51 and 27.11

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Solution

The fourth proportional to 67.71, 101.51 and 27.11 is: 40.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.71 : 101.51 = 27.11 : x
  2. Step 2: Convert to fraction form
    67.71/101.51 = 27.11/x
  3. Step 3: Cross multiply
    67.71x = 101.51 × 27.11
  4. Step 4: Simplify right side
    67.71x = 2,751.94
  5. Step 5: Solve for x
    x = 2,751.94/67.71
  6. Step 6: Final answer
    x = 40.64

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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.