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Finding the Fourth Proportional to 126.50, 174.72 and 102.11

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Solution

The fourth proportional to 126.50, 174.72 and 102.11 is: 141.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.50 : 174.72 = 102.11 : x
  2. Step 2: Convert to fraction form
    126.50/174.72 = 102.11/x
  3. Step 3: Cross multiply
    126.50x = 174.72 × 102.11
  4. Step 4: Simplify right side
    126.50x = 17,840.66
  5. Step 5: Solve for x
    x = 17,840.66/126.50
  6. Step 6: Final answer
    x = 141.03

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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.