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Finding the Fourth Proportional to 167.02, 250.41 and 85.81

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Solution

The fourth proportional to 167.02, 250.41 and 85.81 is: 128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.02 : 250.41 = 85.81 : x
  2. Step 2: Convert to fraction form
    167.02/250.41 = 85.81/x
  3. Step 3: Cross multiply
    167.02x = 250.41 × 85.81
  4. Step 4: Simplify right side
    167.02x = 21,487.68
  5. Step 5: Solve for x
    x = 21,487.68/167.02
  6. Step 6: Final answer
    x = 128.65

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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.