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Finding the Fourth Proportional to 183.38, 252.93 and 128.18

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Solution

The fourth proportional to 183.38, 252.93 and 128.18 is: 176.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.38 : 252.93 = 128.18 : x
  2. Step 2: Convert to fraction form
    183.38/252.93 = 128.18/x
  3. Step 3: Cross multiply
    183.38x = 252.93 × 128.18
  4. Step 4: Simplify right side
    183.38x = 32,420.57
  5. Step 5: Solve for x
    x = 32,420.57/183.38
  6. Step 6: Final answer
    x = 176.79

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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.