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Finding the Fourth Proportional to 149,394.59, 206,161.95 and 81,412.15

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Solution

The fourth proportional to 149,394.59, 206,161.95 and 81,412.15 is: 112,347.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,394.59 : 206,161.95 = 81,412.15 : x
  2. Step 2: Convert to fraction form
    149,394.59/206,161.95 = 81,412.15/x
  3. Step 3: Cross multiply
    149,394.59x = 206,161.95 × 81,412.15
  4. Step 4: Simplify right side
    149,394.59x = 16,784,087,597.69
  5. Step 5: Solve for x
    x = 16,784,087,597.69/149,394.59
  6. Step 6: Final answer
    x = 112,347.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.