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Finding the Fourth Proportional to 163,659.20, 245,229.60 and 137,220.80

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Solution

The fourth proportional to 163,659.20, 245,229.60 and 137,220.80 is: 205,613.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,659.20 : 245,229.60 = 137,220.80 : x
  2. Step 2: Convert to fraction form
    163,659.20/245,229.60 = 137,220.80/x
  3. Step 3: Cross multiply
    163,659.20x = 245,229.60 × 137,220.80
  4. Step 4: Simplify right side
    163,659.20x = 33,650,601,895.68
  5. Step 5: Solve for x
    x = 33,650,601,895.68/163,659.20
  6. Step 6: Final answer
    x = 205,613.87

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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.