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Finding the Fourth Proportional to 159.06, 219.42 and 137.19

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Solution

The fourth proportional to 159.06, 219.42 and 137.19 is: 189.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.06 : 219.42 = 137.19 : x
  2. Step 2: Convert to fraction form
    159.06/219.42 = 137.19/x
  3. Step 3: Cross multiply
    159.06x = 219.42 × 137.19
  4. Step 4: Simplify right side
    159.06x = 30,101.68
  5. Step 5: Solve for x
    x = 30,101.68/159.06
  6. Step 6: Final answer
    x = 189.25

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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.