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Finding the Fourth Proportional to 139,861.74, 193,009.22 and 76,199.54

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Solution

The fourth proportional to 139,861.74, 193,009.22 and 76,199.54 is: 105,155.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,861.74 : 193,009.22 = 76,199.54 : x
  2. Step 2: Convert to fraction form
    139,861.74/193,009.22 = 76,199.54/x
  3. Step 3: Cross multiply
    139,861.74x = 193,009.22 × 76,199.54
  4. Step 4: Simplify right side
    139,861.74x = 14,707,212,433.72
  5. Step 5: Solve for x
    x = 14,707,212,433.72/139,861.74
  6. Step 6: Final answer
    x = 105,155.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.