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Finding the Fourth Proportional to 106.01, 158.76 and 86.62

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Solution

The fourth proportional to 106.01, 158.76 and 86.62 is: 129.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.01 : 158.76 = 86.62 : x
  2. Step 2: Convert to fraction form
    106.01/158.76 = 86.62/x
  3. Step 3: Cross multiply
    106.01x = 158.76 × 86.62
  4. Step 4: Simplify right side
    106.01x = 13,751.39
  5. Step 5: Solve for x
    x = 13,751.39/106.01
  6. Step 6: Final answer
    x = 129.71

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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.