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Finding the Fourth Proportional to 183.96, 253.88 and 121.91

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Solution

The fourth proportional to 183.96, 253.88 and 121.91 is: 168.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.96 : 253.88 = 121.91 : x
  2. Step 2: Convert to fraction form
    183.96/253.88 = 121.91/x
  3. Step 3: Cross multiply
    183.96x = 253.88 × 121.91
  4. Step 4: Simplify right side
    183.96x = 30,949.90
  5. Step 5: Solve for x
    x = 30,949.90/183.96
  6. Step 6: Final answer
    x = 168.25

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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.