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Finding the Fourth Proportional to 158.82, 219 and 129.25

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Solution

The fourth proportional to 158.82, 219 and 129.25 is: 178.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.82 : 219 = 129.25 : x
  2. Step 2: Convert to fraction form
    158.82/219 = 129.25/x
  3. Step 3: Cross multiply
    158.82x = 219 × 129.25
  4. Step 4: Simplify right side
    158.82x = 28,305.75
  5. Step 5: Solve for x
    x = 28,305.75/158.82
  6. Step 6: Final answer
    x = 178.23

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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.