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Finding the Fourth Proportional to 124.19, 171.20 and 103.37

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Solution

The fourth proportional to 124.19, 171.20 and 103.37 is: 142.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.19 : 171.20 = 103.37 : x
  2. Step 2: Convert to fraction form
    124.19/171.20 = 103.37/x
  3. Step 3: Cross multiply
    124.19x = 171.20 × 103.37
  4. Step 4: Simplify right side
    124.19x = 17,695.57
  5. Step 5: Solve for x
    x = 17,695.57/124.19
  6. Step 6: Final answer
    x = 142.49

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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.