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Finding the Fourth Proportional to 57,403.97, 86,145.13 and 19,963.67

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Solution

The fourth proportional to 57,403.97, 86,145.13 and 19,963.67 is: 29,959.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,403.97 : 86,145.13 = 19,963.67 : x
  2. Step 2: Convert to fraction form
    57,403.97/86,145.13 = 19,963.67/x
  3. Step 3: Cross multiply
    57,403.97x = 86,145.13 × 19,963.67
  4. Step 4: Simplify right side
    57,403.97x = 1,719,772,569.73
  5. Step 5: Solve for x
    x = 1,719,772,569.73/57,403.97
  6. Step 6: Final answer
    x = 29,959.12

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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.