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Finding the Fourth Proportional to 173.77, 239.50 and 126.40

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Solution

The fourth proportional to 173.77, 239.50 and 126.40 is: 174.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.77 : 239.50 = 126.40 : x
  2. Step 2: Convert to fraction form
    173.77/239.50 = 126.40/x
  3. Step 3: Cross multiply
    173.77x = 239.50 × 126.40
  4. Step 4: Simplify right side
    173.77x = 30,272.80
  5. Step 5: Solve for x
    x = 30,272.80/173.77
  6. Step 6: Final answer
    x = 174.21

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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.