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Finding the Fourth Proportional to 56,986.60, 78,631.78 and 31,834.60

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Solution

The fourth proportional to 56,986.60, 78,631.78 and 31,834.60 is: 43,926.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,986.60 : 78,631.78 = 31,834.60 : x
  2. Step 2: Convert to fraction form
    56,986.60/78,631.78 = 31,834.60/x
  3. Step 3: Cross multiply
    56,986.60x = 78,631.78 × 31,834.60
  4. Step 4: Simplify right side
    56,986.60x = 2,503,211,263.59
  5. Step 5: Solve for x
    x = 2,503,211,263.59/56,986.60
  6. Step 6: Final answer
    x = 43,926.31

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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.