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Finding the Fourth Proportional to 191,429.56, 287,275.74 and 66,770.56

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Solution

The fourth proportional to 191,429.56, 287,275.74 and 66,770.56 is: 100,201.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,429.56 : 287,275.74 = 66,770.56 : x
  2. Step 2: Convert to fraction form
    191,429.56/287,275.74 = 66,770.56/x
  3. Step 3: Cross multiply
    191,429.56x = 287,275.74 × 66,770.56
  4. Step 4: Simplify right side
    191,429.56x = 19,181,562,034.21
  5. Step 5: Solve for x
    x = 19,181,562,034.21/191,429.56
  6. Step 6: Final answer
    x = 100,201.67

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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.