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Finding the Fourth Proportional to 171.63, 236.81 and 134.75

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Solution

The fourth proportional to 171.63, 236.81 and 134.75 is: 185.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.63 : 236.81 = 134.75 : x
  2. Step 2: Convert to fraction form
    171.63/236.81 = 134.75/x
  3. Step 3: Cross multiply
    171.63x = 236.81 × 134.75
  4. Step 4: Simplify right side
    171.63x = 31,908.29
  5. Step 5: Solve for x
    x = 31,908.29/171.63
  6. Step 6: Final answer
    x = 185.91

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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.