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Finding the Fourth Proportional to 106.56, 158.69 and 105.36

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Solution

The fourth proportional to 106.56, 158.69 and 105.36 is: 156.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.56 : 158.69 = 105.36 : x
  2. Step 2: Convert to fraction form
    106.56/158.69 = 105.36/x
  3. Step 3: Cross multiply
    106.56x = 158.69 × 105.36
  4. Step 4: Simplify right side
    106.56x = 16,719.58
  5. Step 5: Solve for x
    x = 16,719.58/106.56
  6. Step 6: Final answer
    x = 156.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.