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Finding the Fourth Proportional to 159.48, 219.78 and 133.20

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Solution

The fourth proportional to 159.48, 219.78 and 133.20 is: 183.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.48 : 219.78 = 133.20 : x
  2. Step 2: Convert to fraction form
    159.48/219.78 = 133.20/x
  3. Step 3: Cross multiply
    159.48x = 219.78 × 133.20
  4. Step 4: Simplify right side
    159.48x = 29,274.70
  5. Step 5: Solve for x
    x = 29,274.70/159.48
  6. Step 6: Final answer
    x = 183.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.