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Finding the Fourth Proportional to 126.01, 172.62 and 123.18

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Solution

The fourth proportional to 126.01, 172.62 and 123.18 is: 168.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.01 : 172.62 = 123.18 : x
  2. Step 2: Convert to fraction form
    126.01/172.62 = 123.18/x
  3. Step 3: Cross multiply
    126.01x = 172.62 × 123.18
  4. Step 4: Simplify right side
    126.01x = 21,263.33
  5. Step 5: Solve for x
    x = 21,263.33/126.01
  6. Step 6: Final answer
    x = 168.74

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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.