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Finding the Fourth Proportional to 171.15, 236.26 and 118.69

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Solution

The fourth proportional to 171.15, 236.26 and 118.69 is: 163.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.15 : 236.26 = 118.69 : x
  2. Step 2: Convert to fraction form
    171.15/236.26 = 118.69/x
  3. Step 3: Cross multiply
    171.15x = 236.26 × 118.69
  4. Step 4: Simplify right side
    171.15x = 28,041.70
  5. Step 5: Solve for x
    x = 28,041.70/171.15
  6. Step 6: Final answer
    x = 163.84

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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.