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Finding the Fourth Proportional to 103.73, 155.39 and 92.84

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Solution

The fourth proportional to 103.73, 155.39 and 92.84 is: 139.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.73 : 155.39 = 92.84 : x
  2. Step 2: Convert to fraction form
    103.73/155.39 = 92.84/x
  3. Step 3: Cross multiply
    103.73x = 155.39 × 92.84
  4. Step 4: Simplify right side
    103.73x = 14,425.17
  5. Step 5: Solve for x
    x = 14,425.17/103.73
  6. Step 6: Final answer
    x = 139.07

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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.