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Finding the Fourth Proportional to 194,639.87, 268,603.40 and 105,215.87

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Solution

The fourth proportional to 194,639.87, 268,603.40 and 105,215.87 is: 145,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,639.87 : 268,603.40 = 105,215.87 : x
  2. Step 2: Convert to fraction form
    194,639.87/268,603.40 = 105,215.87/x
  3. Step 3: Cross multiply
    194,639.87x = 268,603.40 × 105,215.87
  4. Step 4: Simplify right side
    194,639.87x = 28,261,339,335.98
  5. Step 5: Solve for x
    x = 28,261,339,335.98/194,639.87
  6. Step 6: Final answer
    x = 145,198.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.