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Finding the Fourth Proportional to 124.88, 188.12 and 108.80

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Solution

The fourth proportional to 124.88, 188.12 and 108.80 is: 163.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.88 : 188.12 = 108.80 : x
  2. Step 2: Convert to fraction form
    124.88/188.12 = 108.80/x
  3. Step 3: Cross multiply
    124.88x = 188.12 × 108.80
  4. Step 4: Simplify right side
    124.88x = 20,467.46
  5. Step 5: Solve for x
    x = 20,467.46/124.88
  6. Step 6: Final answer
    x = 163.90

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.