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Finding the Fourth Proportional to 161.10, 241.08 and 131.86

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Solution

The fourth proportional to 161.10, 241.08 and 131.86 is: 197.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.10 : 241.08 = 131.86 : x
  2. Step 2: Convert to fraction form
    161.10/241.08 = 131.86/x
  3. Step 3: Cross multiply
    161.10x = 241.08 × 131.86
  4. Step 4: Simplify right side
    161.10x = 31,788.81
  5. Step 5: Solve for x
    x = 31,788.81/161.10
  6. Step 6: Final answer
    x = 197.32

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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.