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Finding the Fourth Proportional to 68.64, 103.08 and 50.54

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Solution

The fourth proportional to 68.64, 103.08 and 50.54 is: 75.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.64 : 103.08 = 50.54 : x
  2. Step 2: Convert to fraction form
    68.64/103.08 = 50.54/x
  3. Step 3: Cross multiply
    68.64x = 103.08 × 50.54
  4. Step 4: Simplify right side
    68.64x = 5,209.66
  5. Step 5: Solve for x
    x = 5,209.66/68.64
  6. Step 6: Final answer
    x = 75.90

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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.