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Finding the Fourth Proportional to 106.70, 146.97 and 98.82

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Solution

The fourth proportional to 106.70, 146.97 and 98.82 is: 136.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.70 : 146.97 = 98.82 : x
  2. Step 2: Convert to fraction form
    106.70/146.97 = 98.82/x
  3. Step 3: Cross multiply
    106.70x = 146.97 × 98.82
  4. Step 4: Simplify right side
    106.70x = 14,523.58
  5. Step 5: Solve for x
    x = 14,523.58/106.70
  6. Step 6: Final answer
    x = 136.12

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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.