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Finding the Fourth Proportional to 127.18, 174.71 and 125.38

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Solution

The fourth proportional to 127.18, 174.71 and 125.38 is: 172.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.18 : 174.71 = 125.38 : x
  2. Step 2: Convert to fraction form
    127.18/174.71 = 125.38/x
  3. Step 3: Cross multiply
    127.18x = 174.71 × 125.38
  4. Step 4: Simplify right side
    127.18x = 21,905.14
  5. Step 5: Solve for x
    x = 21,905.14/127.18
  6. Step 6: Final answer
    x = 172.24

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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.