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Finding the Fourth Proportional to 167.93, 231.61 and 121.45

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Solution

The fourth proportional to 167.93, 231.61 and 121.45 is: 167.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.93 : 231.61 = 121.45 : x
  2. Step 2: Convert to fraction form
    167.93/231.61 = 121.45/x
  3. Step 3: Cross multiply
    167.93x = 231.61 × 121.45
  4. Step 4: Simplify right side
    167.93x = 28,129.48
  5. Step 5: Solve for x
    x = 28,129.48/167.93
  6. Step 6: Final answer
    x = 167.51

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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.