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Finding the Fourth Proportional to 126.81, 173.87 and 125.60

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Solution

The fourth proportional to 126.81, 173.87 and 125.60 is: 172.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.81 : 173.87 = 125.60 : x
  2. Step 2: Convert to fraction form
    126.81/173.87 = 125.60/x
  3. Step 3: Cross multiply
    126.81x = 173.87 × 125.60
  4. Step 4: Simplify right side
    126.81x = 21,837.05
  5. Step 5: Solve for x
    x = 21,837.05/126.81
  6. Step 6: Final answer
    x = 172.20

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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.