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Finding the Fourth Proportional to 161.02, 221.79 and 140.26

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Solution

The fourth proportional to 161.02, 221.79 and 140.26 is: 193.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    161.02 : 221.79 = 140.26 : x
  2. Step 2: Convert to fraction form
    161.02/221.79 = 140.26/x
  3. Step 3: Cross multiply
    161.02x = 221.79 × 140.26
  4. Step 4: Simplify right side
    161.02x = 31,108.27
  5. Step 5: Solve for x
    x = 31,108.27/161.02
  6. Step 6: Final answer
    x = 193.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.