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Finding the Fourth Proportional to 118,107.51, 162,947.48 and 75,689.43

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Solution

The fourth proportional to 118,107.51, 162,947.48 and 75,689.43 is: 104,425.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,107.51 : 162,947.48 = 75,689.43 : x
  2. Step 2: Convert to fraction form
    118,107.51/162,947.48 = 75,689.43/x
  3. Step 3: Cross multiply
    118,107.51x = 162,947.48 × 75,689.43
  4. Step 4: Simplify right side
    118,107.51x = 12,333,401,502.69
  5. Step 5: Solve for x
    x = 12,333,401,502.69/118,107.51
  6. Step 6: Final answer
    x = 104,425.21

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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.