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Finding the Fourth Proportional to 159,965.32, 239,925.42 and 87,940.68

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Solution

The fourth proportional to 159,965.32, 239,925.42 and 87,940.68 is: 131,898.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,965.32 : 239,925.42 = 87,940.68 : x
  2. Step 2: Convert to fraction form
    159,965.32/239,925.42 = 87,940.68/x
  3. Step 3: Cross multiply
    159,965.32x = 239,925.42 × 87,940.68
  4. Step 4: Simplify right side
    159,965.32x = 21,099,204,584.09
  5. Step 5: Solve for x
    x = 21,099,204,584.09/159,965.32
  6. Step 6: Final answer
    x = 131,898.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.