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Finding the Fourth Proportional to 127.24, 174.33 and 125.64

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Solution

The fourth proportional to 127.24, 174.33 and 125.64 is: 172.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.24 : 174.33 = 125.64 : x
  2. Step 2: Convert to fraction form
    127.24/174.33 = 125.64/x
  3. Step 3: Cross multiply
    127.24x = 174.33 × 125.64
  4. Step 4: Simplify right side
    127.24x = 21,902.82
  5. Step 5: Solve for x
    x = 21,902.82/127.24
  6. Step 6: Final answer
    x = 172.14

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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.