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Finding the Fourth Proportional to 158.92, 219.36 and 109.15

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Solution

The fourth proportional to 158.92, 219.36 and 109.15 is: 150.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.92 : 219.36 = 109.15 : x
  2. Step 2: Convert to fraction form
    158.92/219.36 = 109.15/x
  3. Step 3: Cross multiply
    158.92x = 219.36 × 109.15
  4. Step 4: Simplify right side
    158.92x = 23,943.14
  5. Step 5: Solve for x
    x = 23,943.14/158.92
  6. Step 6: Final answer
    x = 150.66

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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.