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Finding the Fourth Proportional to 118.98, 164.11 and 83.52

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Solution

The fourth proportional to 118.98, 164.11 and 83.52 is: 115.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.98 : 164.11 = 83.52 : x
  2. Step 2: Convert to fraction form
    118.98/164.11 = 83.52/x
  3. Step 3: Cross multiply
    118.98x = 164.11 × 83.52
  4. Step 4: Simplify right side
    118.98x = 13,706.79
  5. Step 5: Solve for x
    x = 13,706.79/118.98
  6. Step 6: Final answer
    x = 115.21

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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.