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Finding the Fourth Proportional to 121.25, 182.60 and 115.58

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Solution

The fourth proportional to 121.25, 182.60 and 115.58 is: 174.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.25 : 182.60 = 115.58 : x
  2. Step 2: Convert to fraction form
    121.25/182.60 = 115.58/x
  3. Step 3: Cross multiply
    121.25x = 182.60 × 115.58
  4. Step 4: Simplify right side
    121.25x = 21,103.42
  5. Step 5: Solve for x
    x = 21,103.42/121.25
  6. Step 6: Final answer
    x = 174.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.