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Finding the Fourth Proportional to 133.65, 200.48 and 103.12

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Solution

The fourth proportional to 133.65, 200.48 and 103.12 is: 154.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.65 : 200.48 = 103.12 : x
  2. Step 2: Convert to fraction form
    133.65/200.48 = 103.12/x
  3. Step 3: Cross multiply
    133.65x = 200.48 × 103.12
  4. Step 4: Simplify right side
    133.65x = 20,673.50
  5. Step 5: Solve for x
    x = 20,673.50/133.65
  6. Step 6: Final answer
    x = 154.68

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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.