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Finding the Fourth Proportional to 106.62, 146.95 and 84.75

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Solution

The fourth proportional to 106.62, 146.95 and 84.75 is: 116.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.62 : 146.95 = 84.75 : x
  2. Step 2: Convert to fraction form
    106.62/146.95 = 84.75/x
  3. Step 3: Cross multiply
    106.62x = 146.95 × 84.75
  4. Step 4: Simplify right side
    106.62x = 12,453.25
  5. Step 5: Solve for x
    x = 12,453.25/106.62
  6. Step 6: Final answer
    x = 116.80

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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.