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Finding the Fourth Proportional to 126.33, 174.27 and 84.90

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Solution

The fourth proportional to 126.33, 174.27 and 84.90 is: 117.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    126.33 : 174.27 = 84.90 : x
  2. Step 2: Convert to fraction form
    126.33/174.27 = 84.90/x
  3. Step 3: Cross multiply
    126.33x = 174.27 × 84.90
  4. Step 4: Simplify right side
    126.33x = 14,796.49
  5. Step 5: Solve for x
    x = 14,796.49/126.33
  6. Step 6: Final answer
    x = 117.13

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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.