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Finding the Fourth Proportional to 166.10, 248.85 and 140.30

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Solution

The fourth proportional to 166.10, 248.85 and 140.30 is: 210.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    166.10 : 248.85 = 140.30 : x
  2. Step 2: Convert to fraction form
    166.10/248.85 = 140.30/x
  3. Step 3: Cross multiply
    166.10x = 248.85 × 140.30
  4. Step 4: Simplify right side
    166.10x = 34,913.66
  5. Step 5: Solve for x
    x = 34,913.66/166.10
  6. Step 6: Final answer
    x = 210.20

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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.