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Finding the Fourth Proportional to 67.14, 100.55 and 40.11

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Solution

The fourth proportional to 67.14, 100.55 and 40.11 is: 60.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.14 : 100.55 = 40.11 : x
  2. Step 2: Convert to fraction form
    67.14/100.55 = 40.11/x
  3. Step 3: Cross multiply
    67.14x = 100.55 × 40.11
  4. Step 4: Simplify right side
    67.14x = 4,032.78
  5. Step 5: Solve for x
    x = 4,032.78/67.14
  6. Step 6: Final answer
    x = 60.07

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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.