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Finding the Fourth Proportional to 173.82, 260.86 and 87.13

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Solution

The fourth proportional to 173.82, 260.86 and 87.13 is: 130.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.82 : 260.86 = 87.13 : x
  2. Step 2: Convert to fraction form
    173.82/260.86 = 87.13/x
  3. Step 3: Cross multiply
    173.82x = 260.86 × 87.13
  4. Step 4: Simplify right side
    173.82x = 22,729.82
  5. Step 5: Solve for x
    x = 22,729.82/173.82
  6. Step 6: Final answer
    x = 130.76

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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.