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Finding the Fourth Proportional to 139,865.63, 193,012.11 and 76,203.87

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Solution

The fourth proportional to 139,865.63, 193,012.11 and 76,203.87 is: 105,160.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,865.63 : 193,012.11 = 76,203.87 : x
  2. Step 2: Convert to fraction form
    139,865.63/193,012.11 = 76,203.87/x
  3. Step 3: Cross multiply
    139,865.63x = 193,012.11 × 76,203.87
  4. Step 4: Simplify right side
    139,865.63x = 14,708,269,738.87
  5. Step 5: Solve for x
    x = 14,708,269,738.87/139,865.63
  6. Step 6: Final answer
    x = 105,160.00

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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.