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Finding the Fourth Proportional to 106.59, 158.68 and 105.42

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Solution

The fourth proportional to 106.59, 158.68 and 105.42 is: 156.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.59 : 158.68 = 105.42 : x
  2. Step 2: Convert to fraction form
    106.59/158.68 = 105.42/x
  3. Step 3: Cross multiply
    106.59x = 158.68 × 105.42
  4. Step 4: Simplify right side
    106.59x = 16,728.05
  5. Step 5: Solve for x
    x = 16,728.05/106.59
  6. Step 6: Final answer
    x = 156.94

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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.