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Finding the Fourth Proportional to 161.32, 224.19 and 159.56

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Solution

The fourth proportional to 161.32, 224.19 and 159.56 is: 221.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.32 : 224.19 = 159.56 : x
  2. Step 2: Convert to fraction form
    161.32/224.19 = 159.56/x
  3. Step 3: Cross multiply
    161.32x = 224.19 × 159.56
  4. Step 4: Simplify right side
    161.32x = 35,771.76
  5. Step 5: Solve for x
    x = 35,771.76/161.32
  6. Step 6: Final answer
    x = 221.74

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.