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Finding the Fourth Proportional to 161.09, 241.52 and 69.72

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Solution

The fourth proportional to 161.09, 241.52 and 69.72 is: 104.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.09 : 241.52 = 69.72 : x
  2. Step 2: Convert to fraction form
    161.09/241.52 = 69.72/x
  3. Step 3: Cross multiply
    161.09x = 241.52 × 69.72
  4. Step 4: Simplify right side
    161.09x = 16,838.43
  5. Step 5: Solve for x
    x = 16,838.43/161.09
  6. Step 6: Final answer
    x = 104.53

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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.