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Finding the Fourth Proportional to 138,325.80, 207,197.10 and 123,551.40

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Solution

The fourth proportional to 138,325.80, 207,197.10 and 123,551.40 is: 185,066.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,325.80 : 207,197.10 = 123,551.40 : x
  2. Step 2: Convert to fraction form
    138,325.80/207,197.10 = 123,551.40/x
  3. Step 3: Cross multiply
    138,325.80x = 207,197.10 × 123,551.40
  4. Step 4: Simplify right side
    138,325.80x = 25,599,491,780.94
  5. Step 5: Solve for x
    x = 25,599,491,780.94/138,325.80
  6. Step 6: Final answer
    x = 185,066.65

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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.