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Finding the Fourth Proportional to 68.62, 102.72 and 50.62

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Solution

The fourth proportional to 68.62, 102.72 and 50.62 is: 75.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.62 : 102.72 = 50.62 : x
  2. Step 2: Convert to fraction form
    68.62/102.72 = 50.62/x
  3. Step 3: Cross multiply
    68.62x = 102.72 × 50.62
  4. Step 4: Simplify right side
    68.62x = 5,199.69
  5. Step 5: Solve for x
    x = 5,199.69/68.62
  6. Step 6: Final answer
    x = 75.78

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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.