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Finding the Fourth Proportional to 106.44, 159.72 and 79.44

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Solution

The fourth proportional to 106.44, 159.72 and 79.44 is: 119.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.44 : 159.72 = 79.44 : x
  2. Step 2: Convert to fraction form
    106.44/159.72 = 79.44/x
  3. Step 3: Cross multiply
    106.44x = 159.72 × 79.44
  4. Step 4: Simplify right side
    106.44x = 12,688.16
  5. Step 5: Solve for x
    x = 12,688.16/106.44
  6. Step 6: Final answer
    x = 119.20

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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.