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Finding the Fourth Proportional to 94.41, 142.11 and 80.49

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Solution

The fourth proportional to 94.41, 142.11 and 80.49 is: 121.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.41 : 142.11 = 80.49 : x
  2. Step 2: Convert to fraction form
    94.41/142.11 = 80.49/x
  3. Step 3: Cross multiply
    94.41x = 142.11 × 80.49
  4. Step 4: Simplify right side
    94.41x = 11,438.64
  5. Step 5: Solve for x
    x = 11,438.64/94.41
  6. Step 6: Final answer
    x = 121.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.