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Finding the Fourth Proportional to 183.20, 252.81 and 105.57

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Solution

The fourth proportional to 183.20, 252.81 and 105.57 is: 145.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    183.20 : 252.81 = 105.57 : x
  2. Step 2: Convert to fraction form
    183.20/252.81 = 105.57/x
  3. Step 3: Cross multiply
    183.20x = 252.81 × 105.57
  4. Step 4: Simplify right side
    183.20x = 26,689.15
  5. Step 5: Solve for x
    x = 26,689.15/183.20
  6. Step 6: Final answer
    x = 145.69

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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.