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Finding the Fourth Proportional to 171.60, 257.54 and 126.11

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Solution

The fourth proportional to 171.60, 257.54 and 126.11 is: 189.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.60 : 257.54 = 126.11 : x
  2. Step 2: Convert to fraction form
    171.60/257.54 = 126.11/x
  3. Step 3: Cross multiply
    171.60x = 257.54 × 126.11
  4. Step 4: Simplify right side
    171.60x = 32,476.45
  5. Step 5: Solve for x
    x = 32,476.45/171.60
  6. Step 6: Final answer
    x = 189.26

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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.