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Finding the Fourth Proportional to 106.67, 159.86 and 105.53

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Solution

The fourth proportional to 106.67, 159.86 and 105.53 is: 158.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.67 : 159.86 = 105.53 : x
  2. Step 2: Convert to fraction form
    106.67/159.86 = 105.53/x
  3. Step 3: Cross multiply
    106.67x = 159.86 × 105.53
  4. Step 4: Simplify right side
    106.67x = 16,868.70
  5. Step 5: Solve for x
    x = 16,868.70/106.67
  6. Step 6: Final answer
    x = 158.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.