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Finding the Fourth Proportional to 189,190.66, 261,084.88 and 104,310.76

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Solution

The fourth proportional to 189,190.66, 261,084.88 and 104,310.76 is: 143,949.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,190.66 : 261,084.88 = 104,310.76 : x
  2. Step 2: Convert to fraction form
    189,190.66/261,084.88 = 104,310.76/x
  3. Step 3: Cross multiply
    189,190.66x = 261,084.88 × 104,310.76
  4. Step 4: Simplify right side
    189,190.66x = 27,233,962,257.31
  5. Step 5: Solve for x
    x = 27,233,962,257.31/189,190.66
  6. Step 6: Final answer
    x = 143,949.82

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1.5x scale

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.