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Finding the Fourth Proportional to 191,617.56, 287,428.02 and 66,958.84

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Solution

The fourth proportional to 191,617.56, 287,428.02 and 66,958.84 is: 100,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,617.56 : 287,428.02 = 66,958.84 : x
  2. Step 2: Convert to fraction form
    191,617.56/287,428.02 = 66,958.84/x
  3. Step 3: Cross multiply
    191,617.56x = 287,428.02 × 66,958.84
  4. Step 4: Simplify right side
    191,617.56x = 19,245,846,802.70
  5. Step 5: Solve for x
    x = 19,245,846,802.70/191,617.56
  6. Step 6: Final answer
    x = 100,438.85

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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.