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Finding the Fourth Proportional to 127.94, 176.60 and 91.13

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Solution

The fourth proportional to 127.94, 176.60 and 91.13 is: 125.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    127.94 : 176.60 = 91.13 : x
  2. Step 2: Convert to fraction form
    127.94/176.60 = 91.13/x
  3. Step 3: Cross multiply
    127.94x = 176.60 × 91.13
  4. Step 4: Simplify right side
    127.94x = 16,093.56
  5. Step 5: Solve for x
    x = 16,093.56/127.94
  6. Step 6: Final answer
    x = 125.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.