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Finding the Fourth Proportional to 133.81, 200.75 and 48.31

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Solution

The fourth proportional to 133.81, 200.75 and 48.31 is: 72.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.81 : 200.75 = 48.31 : x
  2. Step 2: Convert to fraction form
    133.81/200.75 = 48.31/x
  3. Step 3: Cross multiply
    133.81x = 200.75 × 48.31
  4. Step 4: Simplify right side
    133.81x = 9,698.67
  5. Step 5: Solve for x
    x = 9,698.67/133.81
  6. Step 6: Final answer
    x = 72.48

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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.