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Finding the Fourth Proportional to 171.96, 257.58 and 111.18

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Solution

The fourth proportional to 171.96, 257.58 and 111.18 is: 166.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.96 : 257.58 = 111.18 : x
  2. Step 2: Convert to fraction form
    171.96/257.58 = 111.18/x
  3. Step 3: Cross multiply
    171.96x = 257.58 × 111.18
  4. Step 4: Simplify right side
    171.96x = 28,637.74
  5. Step 5: Solve for x
    x = 28,637.74/171.96
  6. Step 6: Final answer
    x = 166.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.