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Finding the Fourth Proportional to 124.52, 170.60 and 122.81

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Solution

The fourth proportional to 124.52, 170.60 and 122.81 is: 168.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.52 : 170.60 = 122.81 : x
  2. Step 2: Convert to fraction form
    124.52/170.60 = 122.81/x
  3. Step 3: Cross multiply
    124.52x = 170.60 × 122.81
  4. Step 4: Simplify right side
    124.52x = 20,949.92
  5. Step 5: Solve for x
    x = 20,949.92/124.52
  6. Step 6: Final answer
    x = 168.25

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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.