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Finding the Fourth Proportional to 159.29, 219.69 and 126.49

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Solution

The fourth proportional to 159.29, 219.69 and 126.49 is: 174.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.29 : 219.69 = 126.49 : x
  2. Step 2: Convert to fraction form
    159.29/219.69 = 126.49/x
  3. Step 3: Cross multiply
    159.29x = 219.69 × 126.49
  4. Step 4: Simplify right side
    159.29x = 27,788.59
  5. Step 5: Solve for x
    x = 27,788.59/159.29
  6. Step 6: Final answer
    x = 174.45

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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.