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Finding the Fourth Proportional to 173.36, 259.84 and 80.87

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Solution

The fourth proportional to 173.36, 259.84 and 80.87 is: 121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.36 : 259.84 = 80.87 : x
  2. Step 2: Convert to fraction form
    173.36/259.84 = 80.87/x
  3. Step 3: Cross multiply
    173.36x = 259.84 × 80.87
  4. Step 4: Simplify right side
    173.36x = 21,012.06
  5. Step 5: Solve for x
    x = 21,012.06/173.36
  6. Step 6: Final answer
    x = 121.20

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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.