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Finding the Fourth Proportional to 106.80, 160.80 and 94.05

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Solution

The fourth proportional to 106.80, 160.80 and 94.05 is: 141.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.80 : 160.80 = 94.05 : x
  2. Step 2: Convert to fraction form
    106.80/160.80 = 94.05/x
  3. Step 3: Cross multiply
    106.80x = 160.80 × 94.05
  4. Step 4: Simplify right side
    106.80x = 15,122.44
  5. Step 5: Solve for x
    x = 15,122.44/106.80
  6. Step 6: Final answer
    x = 141.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.