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Finding the Fourth Proportional to 126.93, 175.11 and 77.13

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Solution

The fourth proportional to 126.93, 175.11 and 77.13 is: 106.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.93 : 175.11 = 77.13 : x
  2. Step 2: Convert to fraction form
    126.93/175.11 = 77.13/x
  3. Step 3: Cross multiply
    126.93x = 175.11 × 77.13
  4. Step 4: Simplify right side
    126.93x = 13,506.23
  5. Step 5: Solve for x
    x = 13,506.23/126.93
  6. Step 6: Final answer
    x = 106.41

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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.