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Finding the Fourth Proportional to 127.04, 174.08 and 122.56

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Solution

The fourth proportional to 127.04, 174.08 and 122.56 is: 167.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.04 : 174.08 = 122.56 : x
  2. Step 2: Convert to fraction form
    127.04/174.08 = 122.56/x
  3. Step 3: Cross multiply
    127.04x = 174.08 × 122.56
  4. Step 4: Simplify right side
    127.04x = 21,335.24
  5. Step 5: Solve for x
    x = 21,335.24/127.04
  6. Step 6: Final answer
    x = 167.94

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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.