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Finding the Fourth Proportional to 180.16, 248.72 and 135.85

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Solution

The fourth proportional to 180.16, 248.72 and 135.85 is: 187.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    180.16 : 248.72 = 135.85 : x
  2. Step 2: Convert to fraction form
    180.16/248.72 = 135.85/x
  3. Step 3: Cross multiply
    180.16x = 248.72 × 135.85
  4. Step 4: Simplify right side
    180.16x = 33,789.24
  5. Step 5: Solve for x
    x = 33,789.24/180.16
  6. Step 6: Final answer
    x = 187.55

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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.