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Finding the Fourth Proportional to 167.40, 231.12 and 134.80

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Solution

The fourth proportional to 167.40, 231.12 and 134.80 is: 186.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.40 : 231.12 = 134.80 : x
  2. Step 2: Convert to fraction form
    167.40/231.12 = 134.80/x
  3. Step 3: Cross multiply
    167.40x = 231.12 × 134.80
  4. Step 4: Simplify right side
    167.40x = 31,154.98
  5. Step 5: Solve for x
    x = 31,154.98/167.40
  6. Step 6: Final answer
    x = 186.11

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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.