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Finding the Fourth Proportional to 161.60, 223.20 and 158.24

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Solution

The fourth proportional to 161.60, 223.20 and 158.24 is: 218.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.60 : 223.20 = 158.24 : x
  2. Step 2: Convert to fraction form
    161.60/223.20 = 158.24/x
  3. Step 3: Cross multiply
    161.60x = 223.20 × 158.24
  4. Step 4: Simplify right side
    161.60x = 35,319.17
  5. Step 5: Solve for x
    x = 35,319.17/161.60
  6. Step 6: Final answer
    x = 218.56

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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.