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Finding the Fourth Proportional to 236.36, 326.19 and 138.13

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Solution

The fourth proportional to 236.36, 326.19 and 138.13 is: 190.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.36 : 326.19 = 138.13 : x
  2. Step 2: Convert to fraction form
    236.36/326.19 = 138.13/x
  3. Step 3: Cross multiply
    236.36x = 326.19 × 138.13
  4. Step 4: Simplify right side
    236.36x = 45,056.66
  5. Step 5: Solve for x
    x = 45,056.66/236.36
  6. Step 6: Final answer
    x = 190.63

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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.