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Finding the Fourth Proportional to 127.79, 175.31 and 119.93

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Solution

The fourth proportional to 127.79, 175.31 and 119.93 is: 164.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.79 : 175.31 = 119.93 : x
  2. Step 2: Convert to fraction form
    127.79/175.31 = 119.93/x
  3. Step 3: Cross multiply
    127.79x = 175.31 × 119.93
  4. Step 4: Simplify right side
    127.79x = 21,024.93
  5. Step 5: Solve for x
    x = 21,024.93/127.79
  6. Step 6: Final answer
    x = 164.53

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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.