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Finding the Fourth Proportional to 78,651.60, 108,541.18 and 42,843.52

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Solution

The fourth proportional to 78,651.60, 108,541.18 and 42,843.52 is: 59,125.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,651.60 : 108,541.18 = 42,843.52 : x
  2. Step 2: Convert to fraction form
    78,651.60/108,541.18 = 42,843.52/x
  3. Step 3: Cross multiply
    78,651.60x = 108,541.18 × 42,843.52
  4. Step 4: Simplify right side
    78,651.60x = 4,650,286,216.15
  5. Step 5: Solve for x
    x = 4,650,286,216.15/78,651.60
  6. Step 6: Final answer
    x = 59,125.13

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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.