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Finding the Fourth Proportional to 74.13, 101.85 and 67.05

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Solution

The fourth proportional to 74.13, 101.85 and 67.05 is: 92.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.13 : 101.85 = 67.05 : x
  2. Step 2: Convert to fraction form
    74.13/101.85 = 67.05/x
  3. Step 3: Cross multiply
    74.13x = 101.85 × 67.05
  4. Step 4: Simplify right side
    74.13x = 6,829.04
  5. Step 5: Solve for x
    x = 6,829.04/74.13
  6. Step 6: Final answer
    x = 92.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.