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Finding the Fourth Proportional to 115.33, 158.81 and 96.88

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Solution

The fourth proportional to 115.33, 158.81 and 96.88 is: 133.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.33 : 158.81 = 96.88 : x
  2. Step 2: Convert to fraction form
    115.33/158.81 = 96.88/x
  3. Step 3: Cross multiply
    115.33x = 158.81 × 96.88
  4. Step 4: Simplify right side
    115.33x = 15,385.03
  5. Step 5: Solve for x
    x = 15,385.03/115.33
  6. Step 6: Final answer
    x = 133.40

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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.