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Finding the Fourth Proportional to 171.17, 236.26 and 105.65

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Solution

The fourth proportional to 171.17, 236.26 and 105.65 is: 145.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.17 : 236.26 = 105.65 : x
  2. Step 2: Convert to fraction form
    171.17/236.26 = 105.65/x
  3. Step 3: Cross multiply
    171.17x = 236.26 × 105.65
  4. Step 4: Simplify right side
    171.17x = 24,960.87
  5. Step 5: Solve for x
    x = 24,960.87/171.17
  6. Step 6: Final answer
    x = 145.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.