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Finding the Fourth Proportional to 163,385.53, 225,472.93 and 91,765.56

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Solution

The fourth proportional to 163,385.53, 225,472.93 and 91,765.56 is: 126,636.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,385.53 : 225,472.93 = 91,765.56 : x
  2. Step 2: Convert to fraction form
    163,385.53/225,472.93 = 91,765.56/x
  3. Step 3: Cross multiply
    163,385.53x = 225,472.93 × 91,765.56
  4. Step 4: Simplify right side
    163,385.53x = 20,690,649,456.88
  5. Step 5: Solve for x
    x = 20,690,649,456.88/163,385.53
  6. Step 6: Final answer
    x = 126,636.98

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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.