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Finding the Fourth Proportional to 183.45, 252.99 and 121.22

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Solution

The fourth proportional to 183.45, 252.99 and 121.22 is: 167.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.45 : 252.99 = 121.22 : x
  2. Step 2: Convert to fraction form
    183.45/252.99 = 121.22/x
  3. Step 3: Cross multiply
    183.45x = 252.99 × 121.22
  4. Step 4: Simplify right side
    183.45x = 30,667.45
  5. Step 5: Solve for x
    x = 30,667.45/183.45
  6. Step 6: Final answer
    x = 167.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.