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Finding the Fourth Proportional to 158.97, 219.38 and 103.74

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Solution

The fourth proportional to 158.97, 219.38 and 103.74 is: 143.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.97 : 219.38 = 103.74 : x
  2. Step 2: Convert to fraction form
    158.97/219.38 = 103.74/x
  3. Step 3: Cross multiply
    158.97x = 219.38 × 103.74
  4. Step 4: Simplify right side
    158.97x = 22,757.96
  5. Step 5: Solve for x
    x = 22,757.96/158.97
  6. Step 6: Final answer
    x = 143.16

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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.