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Finding the Fourth Proportional to 174.54, 261.21 and 126.54

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Solution

The fourth proportional to 174.54, 261.21 and 126.54 is: 189.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.54 : 261.21 = 126.54 : x
  2. Step 2: Convert to fraction form
    174.54/261.21 = 126.54/x
  3. Step 3: Cross multiply
    174.54x = 261.21 × 126.54
  4. Step 4: Simplify right side
    174.54x = 33,053.51
  5. Step 5: Solve for x
    x = 33,053.51/174.54
  6. Step 6: Final answer
    x = 189.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.