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Finding the Fourth Proportional to 127,234.60, 190,688.70 and 71,074.60

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Solution

The fourth proportional to 127,234.60, 190,688.70 and 71,074.60 is: 106,520.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,234.60 : 190,688.70 = 71,074.60 : x
  2. Step 2: Convert to fraction form
    127,234.60/190,688.70 = 71,074.60/x
  3. Step 3: Cross multiply
    127,234.60x = 190,688.70 × 71,074.60
  4. Step 4: Simplify right side
    127,234.60x = 13,553,123,077.02
  5. Step 5: Solve for x
    x = 13,553,123,077.02/127,234.60
  6. Step 6: Final answer
    x = 106,520.73

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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.