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Finding the Fourth Proportional to 173.58, 260.19 and 82.20

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Solution

The fourth proportional to 173.58, 260.19 and 82.20 is: 123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.58 : 260.19 = 82.20 : x
  2. Step 2: Convert to fraction form
    173.58/260.19 = 82.20/x
  3. Step 3: Cross multiply
    173.58x = 260.19 × 82.20
  4. Step 4: Simplify right side
    173.58x = 21,387.62
  5. Step 5: Solve for x
    x = 21,387.62/173.58
  6. Step 6: Final answer
    x = 123.21

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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.