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Finding the Fourth Proportional to 158.48, 217.84 and 136.64

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Solution

The fourth proportional to 158.48, 217.84 and 136.64 is: 187.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.48 : 217.84 = 136.64 : x
  2. Step 2: Convert to fraction form
    158.48/217.84 = 136.64/x
  3. Step 3: Cross multiply
    158.48x = 217.84 × 136.64
  4. Step 4: Simplify right side
    158.48x = 29,765.66
  5. Step 5: Solve for x
    x = 29,765.66/158.48
  6. Step 6: Final answer
    x = 187.82

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.