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Finding the Fourth Proportional to 161.02, 241.41 and 79.81

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Solution

The fourth proportional to 161.02, 241.41 and 79.81 is: 119.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.02 : 241.41 = 79.81 : x
  2. Step 2: Convert to fraction form
    161.02/241.41 = 79.81/x
  3. Step 3: Cross multiply
    161.02x = 241.41 × 79.81
  4. Step 4: Simplify right side
    161.02x = 19,266.93
  5. Step 5: Solve for x
    x = 19,266.93/161.02
  6. Step 6: Final answer
    x = 119.66

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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.