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Finding the Fourth Proportional to 135.23, 186.39 and 117.38

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Solution

The fourth proportional to 135.23, 186.39 and 117.38 is: 161.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.23 : 186.39 = 117.38 : x
  2. Step 2: Convert to fraction form
    135.23/186.39 = 117.38/x
  3. Step 3: Cross multiply
    135.23x = 186.39 × 117.38
  4. Step 4: Simplify right side
    135.23x = 21,877.53
  5. Step 5: Solve for x
    x = 21,877.53/135.23
  6. Step 6: Final answer
    x = 161.79

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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.