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Finding the Fourth Proportional to 67.13, 92.04 and 66.42

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Solution

The fourth proportional to 67.13, 92.04 and 66.42 is: 91.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.13 : 92.04 = 66.42 : x
  2. Step 2: Convert to fraction form
    67.13/92.04 = 66.42/x
  3. Step 3: Cross multiply
    67.13x = 92.04 × 66.42
  4. Step 4: Simplify right side
    67.13x = 6,113.05
  5. Step 5: Solve for x
    x = 6,113.05/67.13
  6. Step 6: Final answer
    x = 91.06

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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.