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Finding the Fourth Proportional to 167.93, 251.86 and 50.78

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Solution

The fourth proportional to 167.93, 251.86 and 50.78 is: 76.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    167.93 : 251.86 = 50.78 : x
  2. Step 2: Convert to fraction form
    167.93/251.86 = 50.78/x
  3. Step 3: Cross multiply
    167.93x = 251.86 × 50.78
  4. Step 4: Simplify right side
    167.93x = 12,788.06
  5. Step 5: Solve for x
    x = 12,788.06/167.93
  6. Step 6: Final answer
    x = 76.15

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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.