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Finding the Fourth Proportional to 161.32, 241.09 and 138.60

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Solution

The fourth proportional to 161.32, 241.09 and 138.60 is: 207.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.32 : 241.09 = 138.60 : x
  2. Step 2: Convert to fraction form
    161.32/241.09 = 138.60/x
  3. Step 3: Cross multiply
    161.32x = 241.09 × 138.60
  4. Step 4: Simplify right side
    161.32x = 33,415.07
  5. Step 5: Solve for x
    x = 33,415.07/161.32
  6. Step 6: Final answer
    x = 207.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.