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Finding the Fourth Proportional to 167.81, 231.63 and 109.60

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Solution

The fourth proportional to 167.81, 231.63 and 109.60 is: 151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.81 : 231.63 = 109.60 : x
  2. Step 2: Convert to fraction form
    167.81/231.63 = 109.60/x
  3. Step 3: Cross multiply
    167.81x = 231.63 × 109.60
  4. Step 4: Simplify right side
    167.81x = 25,386.07
  5. Step 5: Solve for x
    x = 25,386.07/167.81
  6. Step 6: Final answer
    x = 151.28

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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.