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Finding the Fourth Proportional to 236.72, 326.60 and 138.50

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Solution

The fourth proportional to 236.72, 326.60 and 138.50 is: 191.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.72 : 326.60 = 138.50 : x
  2. Step 2: Convert to fraction form
    236.72/326.60 = 138.50/x
  3. Step 3: Cross multiply
    236.72x = 326.60 × 138.50
  4. Step 4: Simplify right side
    236.72x = 45,234.10
  5. Step 5: Solve for x
    x = 45,234.10/236.72
  6. Step 6: Final answer
    x = 191.09

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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.