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Finding the Fourth Proportional to 159.46, 219.90 and 106.99

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Solution

The fourth proportional to 159.46, 219.90 and 106.99 is: 147.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.46 : 219.90 = 106.99 : x
  2. Step 2: Convert to fraction form
    159.46/219.90 = 106.99/x
  3. Step 3: Cross multiply
    159.46x = 219.90 × 106.99
  4. Step 4: Simplify right side
    159.46x = 23,527.10
  5. Step 5: Solve for x
    x = 23,527.10/159.46
  6. Step 6: Final answer
    x = 147.54

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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.