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Finding the Fourth Proportional to 163,612.71, 225,781.43 and 91,992.65

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Solution

The fourth proportional to 163,612.71, 225,781.43 and 91,992.65 is: 126,947.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,612.71 : 225,781.43 = 91,992.65 : x
  2. Step 2: Convert to fraction form
    163,612.71/225,781.43 = 91,992.65/x
  3. Step 3: Cross multiply
    163,612.71x = 225,781.43 × 91,992.65
  4. Step 4: Simplify right side
    163,612.71x = 20,770,230,477.62
  5. Step 5: Solve for x
    x = 20,770,230,477.62/163,612.71
  6. Step 6: Final answer
    x = 126,947.54

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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.