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Finding the Fourth Proportional to 106.80, 159.96 and 104.58

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Solution

The fourth proportional to 106.80, 159.96 and 104.58 is: 156.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.80 : 159.96 = 104.58 : x
  2. Step 2: Convert to fraction form
    106.80/159.96 = 104.58/x
  3. Step 3: Cross multiply
    106.80x = 159.96 × 104.58
  4. Step 4: Simplify right side
    106.80x = 16,728.62
  5. Step 5: Solve for x
    x = 16,728.62/106.80
  6. Step 6: Final answer
    x = 156.63

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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.