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Finding the Fourth Proportional to 161.87, 223.38 and 106.65

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Solution

The fourth proportional to 161.87, 223.38 and 106.65 is: 147.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.87 : 223.38 = 106.65 : x
  2. Step 2: Convert to fraction form
    161.87/223.38 = 106.65/x
  3. Step 3: Cross multiply
    161.87x = 223.38 × 106.65
  4. Step 4: Simplify right side
    161.87x = 23,823.48
  5. Step 5: Solve for x
    x = 23,823.48/161.87
  6. Step 6: Final answer
    x = 147.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.