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Finding the Fourth Proportional to 104.27, 143.81 and 66.87

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Solution

The fourth proportional to 104.27, 143.81 and 66.87 is: 92.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.27 : 143.81 = 66.87 : x
  2. Step 2: Convert to fraction form
    104.27/143.81 = 66.87/x
  3. Step 3: Cross multiply
    104.27x = 143.81 × 66.87
  4. Step 4: Simplify right side
    104.27x = 9,616.24
  5. Step 5: Solve for x
    x = 9,616.24/104.27
  6. Step 6: Final answer
    x = 92.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.