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Finding the Fourth Proportional to 193,180.70, 289,815.23 and 66,820.86

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Solution

The fourth proportional to 193,180.70, 289,815.23 and 66,820.86 is: 100,246.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,180.70 : 289,815.23 = 66,820.86 : x
  2. Step 2: Convert to fraction form
    193,180.70/289,815.23 = 66,820.86/x
  3. Step 3: Cross multiply
    193,180.70x = 289,815.23 × 66,820.86
  4. Step 4: Simplify right side
    193,180.70x = 19,365,702,575.59
  5. Step 5: Solve for x
    x = 19,365,702,575.59/193,180.70
  6. Step 6: Final answer
    x = 100,246.57

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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.