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Finding the Fourth Proportional to 191,912.20, 287,835.74 and 51,639.56

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Solution

The fourth proportional to 191,912.20, 287,835.74 and 51,639.56 is: 77,450.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,912.20 : 287,835.74 = 51,639.56 : x
  2. Step 2: Convert to fraction form
    191,912.20/287,835.74 = 51,639.56/x
  3. Step 3: Cross multiply
    191,912.20x = 287,835.74 × 51,639.56
  4. Step 4: Simplify right side
    191,912.20x = 14,863,710,965.87
  5. Step 5: Solve for x
    x = 14,863,710,965.87/191,912.20
  6. Step 6: Final answer
    x = 77,450.58

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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.