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Finding the Fourth Proportional to 115.24, 171.97 and 103.09

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Solution

The fourth proportional to 115.24, 171.97 and 103.09 is: 153.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.24 : 171.97 = 103.09 : x
  2. Step 2: Convert to fraction form
    115.24/171.97 = 103.09/x
  3. Step 3: Cross multiply
    115.24x = 171.97 × 103.09
  4. Step 4: Simplify right side
    115.24x = 17,727.01
  5. Step 5: Solve for x
    x = 17,727.01/115.24
  6. Step 6: Final answer
    x = 153.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.