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Finding the Fourth Proportional to 138,616.60, 208,022.10 and 88,817.80

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Solution

The fourth proportional to 138,616.60, 208,022.10 and 88,817.80 is: 133,288.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,616.60 : 208,022.10 = 88,817.80 : x
  2. Step 2: Convert to fraction form
    138,616.60/208,022.10 = 88,817.80/x
  3. Step 3: Cross multiply
    138,616.60x = 208,022.10 × 88,817.80
  4. Step 4: Simplify right side
    138,616.60x = 18,476,065,273.38
  5. Step 5: Solve for x
    x = 18,476,065,273.38/138,616.60
  6. Step 6: Final answer
    x = 133,288.98

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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.