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Finding the Fourth Proportional to 236.68, 326.68 and 138.48

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Solution

The fourth proportional to 236.68, 326.68 and 138.48 is: 191.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.68 : 326.68 = 138.48 : x
  2. Step 2: Convert to fraction form
    236.68/326.68 = 138.48/x
  3. Step 3: Cross multiply
    236.68x = 326.68 × 138.48
  4. Step 4: Simplify right side
    236.68x = 45,238.65
  5. Step 5: Solve for x
    x = 45,238.65/236.68
  6. Step 6: Final answer
    x = 191.14

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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.