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Finding the Fourth Proportional to 112,620.42, 168,813.99 and 92,689.56

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Solution

The fourth proportional to 112,620.42, 168,813.99 and 92,689.56 is: 138,938.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,620.42 : 168,813.99 = 92,689.56 : x
  2. Step 2: Convert to fraction form
    112,620.42/168,813.99 = 92,689.56/x
  3. Step 3: Cross multiply
    112,620.42x = 168,813.99 × 92,689.56
  4. Step 4: Simplify right side
    112,620.42x = 15,647,294,454.94
  5. Step 5: Solve for x
    x = 15,647,294,454.94/112,620.42
  6. Step 6: Final answer
    x = 138,938.34

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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.