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Finding the Fourth Proportional to 103.98, 155.07 and 92.33

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Solution

The fourth proportional to 103.98, 155.07 and 92.33 is: 137.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.98 : 155.07 = 92.33 : x
  2. Step 2: Convert to fraction form
    103.98/155.07 = 92.33/x
  3. Step 3: Cross multiply
    103.98x = 155.07 × 92.33
  4. Step 4: Simplify right side
    103.98x = 14,316.38
  5. Step 5: Solve for x
    x = 14,316.38/103.98
  6. Step 6: Final answer
    x = 137.68

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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.