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Finding the Fourth Proportional to 97.91, 134.03 and 94.81

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Solution

The fourth proportional to 97.91, 134.03 and 94.81 is: 129.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.91 : 134.03 = 94.81 : x
  2. Step 2: Convert to fraction form
    97.91/134.03 = 94.81/x
  3. Step 3: Cross multiply
    97.91x = 134.03 × 94.81
  4. Step 4: Simplify right side
    97.91x = 12,707.38
  5. Step 5: Solve for x
    x = 12,707.38/97.91
  6. Step 6: Final answer
    x = 129.79

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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.