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Finding the Fourth Proportional to 94.09, 140.91 and 92.11

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Solution

The fourth proportional to 94.09, 140.91 and 92.11 is: 137.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.09 : 140.91 = 92.11 : x
  2. Step 2: Convert to fraction form
    94.09/140.91 = 92.11/x
  3. Step 3: Cross multiply
    94.09x = 140.91 × 92.11
  4. Step 4: Simplify right side
    94.09x = 12,979.22
  5. Step 5: Solve for x
    x = 12,979.22/94.09
  6. Step 6: Final answer
    x = 137.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.