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Finding the Fourth Proportional to 126.26, 172.72 and 125.94

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Solution

The fourth proportional to 126.26, 172.72 and 125.94 is: 172.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.26 : 172.72 = 125.94 : x
  2. Step 2: Convert to fraction form
    126.26/172.72 = 125.94/x
  3. Step 3: Cross multiply
    126.26x = 172.72 × 125.94
  4. Step 4: Simplify right side
    126.26x = 21,752.36
  5. Step 5: Solve for x
    x = 21,752.36/126.26
  6. Step 6: Final answer
    x = 172.28

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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.