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Finding the Fourth Proportional to 124.72, 170.54 and 120.24

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Solution

The fourth proportional to 124.72, 170.54 and 120.24 is: 164.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.72 : 170.54 = 120.24 : x
  2. Step 2: Convert to fraction form
    124.72/170.54 = 120.24/x
  3. Step 3: Cross multiply
    124.72x = 170.54 × 120.24
  4. Step 4: Simplify right side
    124.72x = 20,505.73
  5. Step 5: Solve for x
    x = 20,505.73/124.72
  6. Step 6: Final answer
    x = 164.41

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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.