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Finding the Fourth Proportional to 103.35, 154.94 and 38.31

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Solution

The fourth proportional to 103.35, 154.94 and 38.31 is: 57.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.35 : 154.94 = 38.31 : x
  2. Step 2: Convert to fraction form
    103.35/154.94 = 38.31/x
  3. Step 3: Cross multiply
    103.35x = 154.94 × 38.31
  4. Step 4: Simplify right side
    103.35x = 5,935.75
  5. Step 5: Solve for x
    x = 5,935.75/103.35
  6. Step 6: Final answer
    x = 57.43

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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.