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Finding the Fourth Proportional to 68.92, 103.40 and 33.77

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Solution

The fourth proportional to 68.92, 103.40 and 33.77 is: 50.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68.92 : 103.40 = 33.77 : x
  2. Step 2: Convert to fraction form
    68.92/103.40 = 33.77/x
  3. Step 3: Cross multiply
    68.92x = 103.40 × 33.77
  4. Step 4: Simplify right side
    68.92x = 3,491.82
  5. Step 5: Solve for x
    x = 3,491.82/68.92
  6. Step 6: Final answer
    x = 50.66

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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.