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Finding the Fourth Proportional to 159,331, 219,891.42 and 87,725.56

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Solution

The fourth proportional to 159,331, 219,891.42 and 87,725.56 is: 121,069.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,331 : 219,891.42 = 87,725.56 : x
  2. Step 2: Convert to fraction form
    159,331/219,891.42 = 87,725.56/x
  3. Step 3: Cross multiply
    159,331x = 219,891.42 × 87,725.56
  4. Step 4: Simplify right side
    159,331x = 19,290,097,958.70
  5. Step 5: Solve for x
    x = 19,290,097,958.70/159,331
  6. Step 6: Final answer
    x = 121,069.33

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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.