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Finding the Fourth Proportional to 63,590.64, 87,755.46 and 39,731.19

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Solution

The fourth proportional to 63,590.64, 87,755.46 and 39,731.19 is: 54,829.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,590.64 : 87,755.46 = 39,731.19 : x
  2. Step 2: Convert to fraction form
    63,590.64/87,755.46 = 39,731.19/x
  3. Step 3: Cross multiply
    63,590.64x = 87,755.46 × 39,731.19
  4. Step 4: Simplify right side
    63,590.64x = 3,486,628,854.80
  5. Step 5: Solve for x
    x = 3,486,628,854.80/63,590.64
  6. Step 6: Final answer
    x = 54,829.28

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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.