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Finding the Fourth Proportional to 126.05, 173.93 and 79.41

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Solution

The fourth proportional to 126.05, 173.93 and 79.41 is: 109.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.05 : 173.93 = 79.41 : x
  2. Step 2: Convert to fraction form
    126.05/173.93 = 79.41/x
  3. Step 3: Cross multiply
    126.05x = 173.93 × 79.41
  4. Step 4: Simplify right side
    126.05x = 13,812.04
  5. Step 5: Solve for x
    x = 13,812.04/126.05
  6. Step 6: Final answer
    x = 109.58

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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.