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Finding the Fourth Proportional to 126.41, 174.51 and 77.36

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Solution

The fourth proportional to 126.41, 174.51 and 77.36 is: 106.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.41 : 174.51 = 77.36 : x
  2. Step 2: Convert to fraction form
    126.41/174.51 = 77.36/x
  3. Step 3: Cross multiply
    126.41x = 174.51 × 77.36
  4. Step 4: Simplify right side
    126.41x = 13,499.22
  5. Step 5: Solve for x
    x = 13,499.22/126.41
  6. Step 6: Final answer
    x = 106.79

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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.