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Finding the Fourth Proportional to 138,901.94, 208,629.68 and 131,068.38

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Solution

The fourth proportional to 138,901.94, 208,629.68 and 131,068.38 is: 196,863.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,901.94 : 208,629.68 = 131,068.38 : x
  2. Step 2: Convert to fraction form
    138,901.94/208,629.68 = 131,068.38/x
  3. Step 3: Cross multiply
    138,901.94x = 208,629.68 × 131,068.38
  4. Step 4: Simplify right side
    138,901.94x = 27,344,753,522.18
  5. Step 5: Solve for x
    x = 27,344,753,522.18/138,901.94
  6. Step 6: Final answer
    x = 196,863.73

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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.