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Finding the Fourth Proportional to 173.59, 260.21 and 82.21

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Solution

The fourth proportional to 173.59, 260.21 and 82.21 is: 123.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.59 : 260.21 = 82.21 : x
  2. Step 2: Convert to fraction form
    173.59/260.21 = 82.21/x
  3. Step 3: Cross multiply
    173.59x = 260.21 × 82.21
  4. Step 4: Simplify right side
    173.59x = 21,391.86
  5. Step 5: Solve for x
    x = 21,391.86/173.59
  6. Step 6: Final answer
    x = 123.23

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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.