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Finding the Fourth Proportional to 171.11, 236.09 and 101.17

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Solution

The fourth proportional to 171.11, 236.09 and 101.17 is: 139.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.11 : 236.09 = 101.17 : x
  2. Step 2: Convert to fraction form
    171.11/236.09 = 101.17/x
  3. Step 3: Cross multiply
    171.11x = 236.09 × 101.17
  4. Step 4: Simplify right side
    171.11x = 23,885.23
  5. Step 5: Solve for x
    x = 23,885.23/171.11
  6. Step 6: Final answer
    x = 139.59

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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.