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Finding the Fourth Proportional to 137.48, 206.34 and 122.88

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Solution

The fourth proportional to 137.48, 206.34 and 122.88 is: 184.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    137.48 : 206.34 = 122.88 : x
  2. Step 2: Convert to fraction form
    137.48/206.34 = 122.88/x
  3. Step 3: Cross multiply
    137.48x = 206.34 × 122.88
  4. Step 4: Simplify right side
    137.48x = 25,355.06
  5. Step 5: Solve for x
    x = 25,355.06/137.48
  6. Step 6: Final answer
    x = 184.43

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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.