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Finding the Fourth Proportional to 171.63, 236.78 and 119.16

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Solution

The fourth proportional to 171.63, 236.78 and 119.16 is: 164.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.63 : 236.78 = 119.16 : x
  2. Step 2: Convert to fraction form
    171.63/236.78 = 119.16/x
  3. Step 3: Cross multiply
    171.63x = 236.78 × 119.16
  4. Step 4: Simplify right side
    171.63x = 28,214.34
  5. Step 5: Solve for x
    x = 28,214.34/171.63
  6. Step 6: Final answer
    x = 164.39

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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.