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Finding the Fourth Proportional to 67.22, 100.85 and 40.22

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Solution

The fourth proportional to 67.22, 100.85 and 40.22 is: 60.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.22 : 100.85 = 40.22 : x
  2. Step 2: Convert to fraction form
    67.22/100.85 = 40.22/x
  3. Step 3: Cross multiply
    67.22x = 100.85 × 40.22
  4. Step 4: Simplify right side
    67.22x = 4,055.48
  5. Step 5: Solve for x
    x = 4,055.48/67.22
  6. Step 6: Final answer
    x = 60.34

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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.