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Finding the Fourth Proportional to 127.86, 175.72 and 119.76

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Solution

The fourth proportional to 127.86, 175.72 and 119.76 is: 164.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.86 : 175.72 = 119.76 : x
  2. Step 2: Convert to fraction form
    127.86/175.72 = 119.76/x
  3. Step 3: Cross multiply
    127.86x = 175.72 × 119.76
  4. Step 4: Simplify right side
    127.86x = 21,044.23
  5. Step 5: Solve for x
    x = 21,044.23/127.86
  6. Step 6: Final answer
    x = 164.59

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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.