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Finding the Fourth Proportional to 161.63, 223.03 and 99.47

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Solution

The fourth proportional to 161.63, 223.03 and 99.47 is: 137.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.63 : 223.03 = 99.47 : x
  2. Step 2: Convert to fraction form
    161.63/223.03 = 99.47/x
  3. Step 3: Cross multiply
    161.63x = 223.03 × 99.47
  4. Step 4: Simplify right side
    161.63x = 22,183.68
  5. Step 5: Solve for x
    x = 22,183.68/161.63
  6. Step 6: Final answer
    x = 137.25

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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.