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Finding the Fourth Proportional to 171.21, 235.99 and 118.83

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Solution

The fourth proportional to 171.21, 235.99 and 118.83 is: 163.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.21 : 235.99 = 118.83 : x
  2. Step 2: Convert to fraction form
    171.21/235.99 = 118.83/x
  3. Step 3: Cross multiply
    171.21x = 235.99 × 118.83
  4. Step 4: Simplify right side
    171.21x = 28,042.69
  5. Step 5: Solve for x
    x = 28,042.69/171.21
  6. Step 6: Final answer
    x = 163.79

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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.