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Finding the Fourth Proportional to 118,067.64, 162,938.70 and 69,672.12

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Solution

The fourth proportional to 118,067.64, 162,938.70 and 69,672.12 is: 96,150.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,067.64 : 162,938.70 = 69,672.12 : x
  2. Step 2: Convert to fraction form
    118,067.64/162,938.70 = 69,672.12/x
  3. Step 3: Cross multiply
    118,067.64x = 162,938.70 × 69,672.12
  4. Step 4: Simplify right side
    118,067.64x = 11,352,284,659.04
  5. Step 5: Solve for x
    x = 11,352,284,659.04/118,067.64
  6. Step 6: Final answer
    x = 96,150.69

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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.