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Finding the Fourth Proportional to 124.43, 171.25 and 108.63

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Solution

The fourth proportional to 124.43, 171.25 and 108.63 is: 149.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.43 : 171.25 = 108.63 : x
  2. Step 2: Convert to fraction form
    124.43/171.25 = 108.63/x
  3. Step 3: Cross multiply
    124.43x = 171.25 × 108.63
  4. Step 4: Simplify right side
    124.43x = 18,602.62
  5. Step 5: Solve for x
    x = 18,602.62/124.43
  6. Step 6: Final answer
    x = 149.51

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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.