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Finding the Fourth Proportional to 104,687.20, 156,978.24 and 48,478.96

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Solution

The fourth proportional to 104,687.20, 156,978.24 and 48,478.96 is: 72,694.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,687.20 : 156,978.24 = 48,478.96 : x
  2. Step 2: Convert to fraction form
    104,687.20/156,978.24 = 48,478.96/x
  3. Step 3: Cross multiply
    104,687.20x = 156,978.24 × 48,478.96
  4. Step 4: Simplify right side
    104,687.20x = 7,610,141,817.83
  5. Step 5: Solve for x
    x = 7,610,141,817.83/104,687.20
  6. Step 6: Final answer
    x = 72,694.10

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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.