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Finding the Fourth Proportional to 125.56, 174.11 and 121.46

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Solution

The fourth proportional to 125.56, 174.11 and 121.46 is: 168.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.56 : 174.11 = 121.46 : x
  2. Step 2: Convert to fraction form
    125.56/174.11 = 121.46/x
  3. Step 3: Cross multiply
    125.56x = 174.11 × 121.46
  4. Step 4: Simplify right side
    125.56x = 21,147.40
  5. Step 5: Solve for x
    x = 21,147.40/125.56
  6. Step 6: Final answer
    x = 168.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.