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Finding the Fourth Proportional to 163,585.62, 225,747.90 and 91,965.78

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Solution

The fourth proportional to 163,585.62, 225,747.90 and 91,965.78 is: 126,912.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,585.62 : 225,747.90 = 91,965.78 : x
  2. Step 2: Convert to fraction form
    163,585.62/225,747.90 = 91,965.78/x
  3. Step 3: Cross multiply
    163,585.62x = 225,747.90 × 91,965.78
  4. Step 4: Simplify right side
    163,585.62x = 20,761,081,706.86
  5. Step 5: Solve for x
    x = 20,761,081,706.86/163,585.62
  6. Step 6: Final answer
    x = 126,912.63

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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.