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Finding the Fourth Proportional to 167.56, 250.86 and 128.92

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Solution

The fourth proportional to 167.56, 250.86 and 128.92 is: 193.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.56 : 250.86 = 128.92 : x
  2. Step 2: Convert to fraction form
    167.56/250.86 = 128.92/x
  3. Step 3: Cross multiply
    167.56x = 250.86 × 128.92
  4. Step 4: Simplify right side
    167.56x = 32,340.87
  5. Step 5: Solve for x
    x = 32,340.87/167.56
  6. Step 6: Final answer
    x = 193.01

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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.