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Finding the Fourth Proportional to 173.69, 260.18 and 86.97

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Solution

The fourth proportional to 173.69, 260.18 and 86.97 is: 130.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.69 : 260.18 = 86.97 : x
  2. Step 2: Convert to fraction form
    173.69/260.18 = 86.97/x
  3. Step 3: Cross multiply
    173.69x = 260.18 × 86.97
  4. Step 4: Simplify right side
    173.69x = 22,628.72
  5. Step 5: Solve for x
    x = 22,628.72/173.69
  6. Step 6: Final answer
    x = 130.28

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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.