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Finding the Fourth Proportional to 139,028.64, 191,827.44 and 93,790.56

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Solution

The fourth proportional to 139,028.64, 191,827.44 and 93,790.56 is: 129,409.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,028.64 : 191,827.44 = 93,790.56 : x
  2. Step 2: Convert to fraction form
    139,028.64/191,827.44 = 93,790.56/x
  3. Step 3: Cross multiply
    139,028.64x = 191,827.44 × 93,790.56
  4. Step 4: Simplify right side
    139,028.64x = 17,991,603,020.97
  5. Step 5: Solve for x
    x = 17,991,603,020.97/139,028.64
  6. Step 6: Final answer
    x = 129,409.33

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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.