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Finding the Fourth Proportional to 191,449.56, 287,305.56 and 66,790.56

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Solution

The fourth proportional to 191,449.56, 287,305.56 and 66,790.56 is: 100,231.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,449.56 : 287,305.56 = 66,790.56 : x
  2. Step 2: Convert to fraction form
    191,449.56/287,305.56 = 66,790.56/x
  3. Step 3: Cross multiply
    191,449.56x = 287,305.56 × 66,790.56
  4. Step 4: Simplify right side
    191,449.56x = 19,189,299,243.51
  5. Step 5: Solve for x
    x = 19,189,299,243.51/191,449.56
  6. Step 6: Final answer
    x = 100,231.62

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1.5x scale

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.