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Finding the Fourth Proportional to 103.50, 154.45 and 94.42

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Solution

The fourth proportional to 103.50, 154.45 and 94.42 is: 140.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103.50 : 154.45 = 94.42 : x
  2. Step 2: Convert to fraction form
    103.50/154.45 = 94.42/x
  3. Step 3: Cross multiply
    103.50x = 154.45 × 94.42
  4. Step 4: Simplify right side
    103.50x = 14,583.17
  5. Step 5: Solve for x
    x = 14,583.17/103.50
  6. Step 6: Final answer
    x = 140.90

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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.