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Finding the Fourth Proportional to 191,634.56, 287,583.84 and 66,975.56

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Solution

The fourth proportional to 191,634.56, 287,583.84 and 66,975.56 is: 100,509.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,634.56 : 287,583.84 = 66,975.56 : x
  2. Step 2: Convert to fraction form
    191,634.56/287,583.84 = 66,975.56/x
  3. Step 3: Cross multiply
    191,634.56x = 287,583.84 × 66,975.56
  4. Step 4: Simplify right side
    191,634.56x = 19,261,088,730.95
  5. Step 5: Solve for x
    x = 19,261,088,730.95/191,634.56
  6. Step 6: Final answer
    x = 100,509.47

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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.