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Finding the Fourth Proportional to 138,863.46, 208,270.35 and 63,980.58

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Solution

The fourth proportional to 138,863.46, 208,270.35 and 63,980.58 is: 95,959.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,863.46 : 208,270.35 = 63,980.58 : x
  2. Step 2: Convert to fraction form
    138,863.46/208,270.35 = 63,980.58/x
  3. Step 3: Cross multiply
    138,863.46x = 208,270.35 × 63,980.58
  4. Step 4: Simplify right side
    138,863.46x = 13,325,257,789.80
  5. Step 5: Solve for x
    x = 13,325,257,789.80/138,863.46
  6. Step 6: Final answer
    x = 95,959.43

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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.