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Finding the Fourth Proportional to 57,605.07, 86,414.51 and 54,455.79

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Solution

The fourth proportional to 57,605.07, 86,414.51 and 54,455.79 is: 81,690.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,605.07 : 86,414.51 = 54,455.79 : x
  2. Step 2: Convert to fraction form
    57,605.07/86,414.51 = 54,455.79/x
  3. Step 3: Cross multiply
    57,605.07x = 86,414.51 × 54,455.79
  4. Step 4: Simplify right side
    57,605.07x = 4,705,770,409.51
  5. Step 5: Solve for x
    x = 4,705,770,409.51/57,605.07
  6. Step 6: Final answer
    x = 81,690.21

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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.