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Finding the Fourth Proportional to 126.16, 174.08 and 79.54

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Solution

The fourth proportional to 126.16, 174.08 and 79.54 is: 109.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.16 : 174.08 = 79.54 : x
  2. Step 2: Convert to fraction form
    126.16/174.08 = 79.54/x
  3. Step 3: Cross multiply
    126.16x = 174.08 × 79.54
  4. Step 4: Simplify right side
    126.16x = 13,846.32
  5. Step 5: Solve for x
    x = 13,846.32/126.16
  6. Step 6: Final answer
    x = 109.75

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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.