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Finding the Fourth Proportional to 173.36, 260.20 and 137.68

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Solution

The fourth proportional to 173.36, 260.20 and 137.68 is: 206.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.36 : 260.20 = 137.68 : x
  2. Step 2: Convert to fraction form
    173.36/260.20 = 137.68/x
  3. Step 3: Cross multiply
    173.36x = 260.20 × 137.68
  4. Step 4: Simplify right side
    173.36x = 35,824.34
  5. Step 5: Solve for x
    x = 35,824.34/173.36
  6. Step 6: Final answer
    x = 206.65

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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.