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Finding the Fourth Proportional to 182.45, 251.78 and 103.78

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Solution

The fourth proportional to 182.45, 251.78 and 103.78 is: 143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    182.45 : 251.78 = 103.78 : x
  2. Step 2: Convert to fraction form
    182.45/251.78 = 103.78/x
  3. Step 3: Cross multiply
    182.45x = 251.78 × 103.78
  4. Step 4: Simplify right side
    182.45x = 26,129.52
  5. Step 5: Solve for x
    x = 26,129.52/182.45
  6. Step 6: Final answer
    x = 143.21

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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.