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Finding the Fourth Proportional to 173.82, 260.78 and 87.16

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Solution

The fourth proportional to 173.82, 260.78 and 87.16 is: 130.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.82 : 260.78 = 87.16 : x
  2. Step 2: Convert to fraction form
    173.82/260.78 = 87.16/x
  3. Step 3: Cross multiply
    173.82x = 260.78 × 87.16
  4. Step 4: Simplify right side
    173.82x = 22,729.58
  5. Step 5: Solve for x
    x = 22,729.58/173.82
  6. Step 6: Final answer
    x = 130.77

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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.