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Finding the Fourth Proportional to 177.50, 243.60 and 161.10

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Solution

The fourth proportional to 177.50, 243.60 and 161.10 is: 221.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.50 : 243.60 = 161.10 : x
  2. Step 2: Convert to fraction form
    177.50/243.60 = 161.10/x
  3. Step 3: Cross multiply
    177.50x = 243.60 × 161.10
  4. Step 4: Simplify right side
    177.50x = 39,243.96
  5. Step 5: Solve for x
    x = 39,243.96/177.50
  6. Step 6: Final answer
    x = 221.10

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.