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Finding the Fourth Proportional to 161.17, 241.40 and 122.72

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Solution

The fourth proportional to 161.17, 241.40 and 122.72 is: 183.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.17 : 241.40 = 122.72 : x
  2. Step 2: Convert to fraction form
    161.17/241.40 = 122.72/x
  3. Step 3: Cross multiply
    161.17x = 241.40 × 122.72
  4. Step 4: Simplify right side
    161.17x = 29,623.71
  5. Step 5: Solve for x
    x = 29,623.71/161.17
  6. Step 6: Final answer
    x = 183.81

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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.