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Finding the Fourth Proportional to 121.28, 182.74 and 114.62

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Solution

The fourth proportional to 121.28, 182.74 and 114.62 is: 172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121.28 : 182.74 = 114.62 : x
  2. Step 2: Convert to fraction form
    121.28/182.74 = 114.62/x
  3. Step 3: Cross multiply
    121.28x = 182.74 × 114.62
  4. Step 4: Simplify right side
    121.28x = 20,945.66
  5. Step 5: Solve for x
    x = 20,945.66/121.28
  6. Step 6: Final answer
    x = 172.70

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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.