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Finding the Fourth Proportional to 167.51, 231.19 and 109.19

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Solution

The fourth proportional to 167.51, 231.19 and 109.19 is: 150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.51 : 231.19 = 109.19 : x
  2. Step 2: Convert to fraction form
    167.51/231.19 = 109.19/x
  3. Step 3: Cross multiply
    167.51x = 231.19 × 109.19
  4. Step 4: Simplify right side
    167.51x = 25,243.64
  5. Step 5: Solve for x
    x = 25,243.64/167.51
  6. Step 6: Final answer
    x = 150.70

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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.