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Finding the Fourth Proportional to 159,389.44, 219,957.44 and 87,769.31

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Solution

The fourth proportional to 159,389.44, 219,957.44 and 87,769.31 is: 121,121.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,389.44 : 219,957.44 = 87,769.31 : x
  2. Step 2: Convert to fraction form
    159,389.44/219,957.44 = 87,769.31/x
  3. Step 3: Cross multiply
    159,389.44x = 219,957.44 × 87,769.31
  4. Step 4: Simplify right side
    159,389.44x = 19,305,511,199.53
  5. Step 5: Solve for x
    x = 19,305,511,199.53/159,389.44
  6. Step 6: Final answer
    x = 121,121.65

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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.