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Finding the Fourth Proportional to 104.54, 155.90 and 92.89

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Solution

The fourth proportional to 104.54, 155.90 and 92.89 is: 138.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.54 : 155.90 = 92.89 : x
  2. Step 2: Convert to fraction form
    104.54/155.90 = 92.89/x
  3. Step 3: Cross multiply
    104.54x = 155.90 × 92.89
  4. Step 4: Simplify right side
    104.54x = 14,481.45
  5. Step 5: Solve for x
    x = 14,481.45/104.54
  6. Step 6: Final answer
    x = 138.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.