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Finding the Fourth Proportional to 138,807.80, 208,180.54 and 63,855.96

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Solution

The fourth proportional to 138,807.80, 208,180.54 and 63,855.96 is: 95,769.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,807.80 : 208,180.54 = 63,855.96 : x
  2. Step 2: Convert to fraction form
    138,807.80/208,180.54 = 63,855.96/x
  3. Step 3: Cross multiply
    138,807.80x = 208,180.54 × 63,855.96
  4. Step 4: Simplify right side
    138,807.80x = 13,293,568,235.02
  5. Step 5: Solve for x
    x = 13,293,568,235.02/138,807.80
  6. Step 6: Final answer
    x = 95,769.61

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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.