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Finding the Fourth Proportional to 139,718.88, 192,812.06 and 76,057.14

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Solution

The fourth proportional to 139,718.88, 192,812.06 and 76,057.14 is: 104,958.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,718.88 : 192,812.06 = 76,057.14 : x
  2. Step 2: Convert to fraction form
    139,718.88/192,812.06 = 76,057.14/x
  3. Step 3: Cross multiply
    139,718.88x = 192,812.06 × 76,057.14
  4. Step 4: Simplify right side
    139,718.88x = 14,664,733,841.11
  5. Step 5: Solve for x
    x = 14,664,733,841.11/139,718.88
  6. Step 6: Final answer
    x = 104,958.86

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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.