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Finding the Fourth Proportional to 173.96, 260.68 and 128.60

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Solution

The fourth proportional to 173.96, 260.68 and 128.60 is: 192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.96 : 260.68 = 128.60 : x
  2. Step 2: Convert to fraction form
    173.96/260.68 = 128.60/x
  3. Step 3: Cross multiply
    173.96x = 260.68 × 128.60
  4. Step 4: Simplify right side
    173.96x = 33,523.45
  5. Step 5: Solve for x
    x = 33,523.45/173.96
  6. Step 6: Final answer
    x = 192.71

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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.