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Finding the Fourth Proportional to 56,859.45, 78,464.34 and 31,708.95

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Solution

The fourth proportional to 56,859.45, 78,464.34 and 31,708.95 is: 43,757.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,859.45 : 78,464.34 = 31,708.95 : x
  2. Step 2: Convert to fraction form
    56,859.45/78,464.34 = 31,708.95/x
  3. Step 3: Cross multiply
    56,859.45x = 78,464.34 × 31,708.95
  4. Step 4: Simplify right side
    56,859.45x = 2,488,021,833.84
  5. Step 5: Solve for x
    x = 2,488,021,833.84/56,859.45
  6. Step 6: Final answer
    x = 43,757.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.