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Finding the Fourth Proportional to 159,330, 219,890.04 and 87,724.56

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Solution

The fourth proportional to 159,330, 219,890.04 and 87,724.56 is: 121,067.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,330 : 219,890.04 = 87,724.56 : x
  2. Step 2: Convert to fraction form
    159,330/219,890.04 = 87,724.56/x
  3. Step 3: Cross multiply
    159,330x = 219,890.04 × 87,724.56
  4. Step 4: Simplify right side
    159,330x = 19,289,757,007.38
  5. Step 5: Solve for x
    x = 19,289,757,007.38/159,330
  6. Step 6: Final answer
    x = 121,067.95

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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.