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Finding the Fourth Proportional to 138,974.40, 208,154.40 and 107,563.20

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Solution

The fourth proportional to 138,974.40, 208,154.40 and 107,563.20 is: 161,107.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,974.40 : 208,154.40 = 107,563.20 : x
  2. Step 2: Convert to fraction form
    138,974.40/208,154.40 = 107,563.20/x
  3. Step 3: Cross multiply
    138,974.40x = 208,154.40 × 107,563.20
  4. Step 4: Simplify right side
    138,974.40x = 22,389,753,358.08
  5. Step 5: Solve for x
    x = 22,389,753,358.08/138,974.40
  6. Step 6: Final answer
    x = 161,107.03

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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.