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Finding the Fourth Proportional to 124.13, 170.38 and 118.85

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Solution

The fourth proportional to 124.13, 170.38 and 118.85 is: 163.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.13 : 170.38 = 118.85 : x
  2. Step 2: Convert to fraction form
    124.13/170.38 = 118.85/x
  3. Step 3: Cross multiply
    124.13x = 170.38 × 118.85
  4. Step 4: Simplify right side
    124.13x = 20,249.66
  5. Step 5: Solve for x
    x = 20,249.66/124.13
  6. Step 6: Final answer
    x = 163.13

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.