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Finding the Fourth Proportional to 111.88, 168.51 and 94.88

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Solution

The fourth proportional to 111.88, 168.51 and 94.88 is: 142.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    111.88 : 168.51 = 94.88 : x
  2. Step 2: Convert to fraction form
    111.88/168.51 = 94.88/x
  3. Step 3: Cross multiply
    111.88x = 168.51 × 94.88
  4. Step 4: Simplify right side
    111.88x = 15,988.23
  5. Step 5: Solve for x
    x = 15,988.23/111.88
  6. Step 6: Final answer
    x = 142.91

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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.