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Finding the Fourth Proportional to 59,672.80, 89,314.80 and 47,879.20

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Solution

The fourth proportional to 59,672.80, 89,314.80 and 47,879.20 is: 71,662.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    59,672.80 : 89,314.80 = 47,879.20 : x
  2. Step 2: Convert to fraction form
    59,672.80/89,314.80 = 47,879.20/x
  3. Step 3: Cross multiply
    59,672.80x = 89,314.80 × 47,879.20
  4. Step 4: Simplify right side
    59,672.80x = 4,276,321,172.16
  5. Step 5: Solve for x
    x = 4,276,321,172.16/59,672.80
  6. Step 6: Final answer
    x = 71,662.82

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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.