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Finding the Fourth Proportional to 124.55, 170.90 and 119.69

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Solution

The fourth proportional to 124.55, 170.90 and 119.69 is: 164.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.55 : 170.90 = 119.69 : x
  2. Step 2: Convert to fraction form
    124.55/170.90 = 119.69/x
  3. Step 3: Cross multiply
    124.55x = 170.90 × 119.69
  4. Step 4: Simplify right side
    124.55x = 20,453.57
  5. Step 5: Solve for x
    x = 20,453.57/124.55
  6. Step 6: Final answer
    x = 164.23

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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.