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Finding the Fourth Proportional to 159,323.29, 219,872.41 and 87,709.97

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Solution

The fourth proportional to 159,323.29, 219,872.41 and 87,709.97 is: 121,043.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,323.29 : 219,872.41 = 87,709.97 : x
  2. Step 2: Convert to fraction form
    159,323.29/219,872.41 = 87,709.97/x
  3. Step 3: Cross multiply
    159,323.29x = 219,872.41 × 87,709.97
  4. Step 4: Simplify right side
    159,323.29x = 19,285,002,815.33
  5. Step 5: Solve for x
    x = 19,285,002,815.33/159,323.29
  6. Step 6: Final answer
    x = 121,043.21

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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.