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Finding the Fourth Proportional to 163,270.80, 225,336.44 and 90,690

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Solution

The fourth proportional to 163,270.80, 225,336.44 and 90,690 is: 125,164.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,270.80 : 225,336.44 = 90,690 : x
  2. Step 2: Convert to fraction form
    163,270.80/225,336.44 = 90,690/x
  3. Step 3: Cross multiply
    163,270.80x = 225,336.44 × 90,690
  4. Step 4: Simplify right side
    163,270.80x = 20,435,761,743.60
  5. Step 5: Solve for x
    x = 20,435,761,743.60/163,270.80
  6. Step 6: Final answer
    x = 125,164.83

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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.