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Finding the Fourth Proportional to 161.50, 241.90 and 106.60

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Solution

The fourth proportional to 161.50, 241.90 and 106.60 is: 159.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.50 : 241.90 = 106.60 : x
  2. Step 2: Convert to fraction form
    161.50/241.90 = 106.60/x
  3. Step 3: Cross multiply
    161.50x = 241.90 × 106.60
  4. Step 4: Simplify right side
    161.50x = 25,786.54
  5. Step 5: Solve for x
    x = 25,786.54/161.50
  6. Step 6: Final answer
    x = 159.67

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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.