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Finding the Fourth Proportional to 188.99, 260.57 and 122.49

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Solution

The fourth proportional to 188.99, 260.57 and 122.49 is: 168.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    188.99 : 260.57 = 122.49 : x
  2. Step 2: Convert to fraction form
    188.99/260.57 = 122.49/x
  3. Step 3: Cross multiply
    188.99x = 260.57 × 122.49
  4. Step 4: Simplify right side
    188.99x = 31,915.30
  5. Step 5: Solve for x
    x = 31,915.30/188.99
  6. Step 6: Final answer
    x = 168.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.