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Finding the Fourth Proportional to 113.51, 169.99 and 92.09

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Solution

The fourth proportional to 113.51, 169.99 and 92.09 is: 137.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.51 : 169.99 = 92.09 : x
  2. Step 2: Convert to fraction form
    113.51/169.99 = 92.09/x
  3. Step 3: Cross multiply
    113.51x = 169.99 × 92.09
  4. Step 4: Simplify right side
    113.51x = 15,654.38
  5. Step 5: Solve for x
    x = 15,654.38/113.51
  6. Step 6: Final answer
    x = 137.91

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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.