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Finding the Fourth Proportional to 167.73, 251.53 and 85.41

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Solution

The fourth proportional to 167.73, 251.53 and 85.41 is: 128.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.73 : 251.53 = 85.41 : x
  2. Step 2: Convert to fraction form
    167.73/251.53 = 85.41/x
  3. Step 3: Cross multiply
    167.73x = 251.53 × 85.41
  4. Step 4: Simplify right side
    167.73x = 21,483.18
  5. Step 5: Solve for x
    x = 21,483.18/167.73
  6. Step 6: Final answer
    x = 128.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.