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Finding the Fourth Proportional to 98,912.99, 136,491.83 and 58,072.81

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Solution

The fourth proportional to 98,912.99, 136,491.83 and 58,072.81 is: 80,135.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,912.99 : 136,491.83 = 58,072.81 : x
  2. Step 2: Convert to fraction form
    98,912.99/136,491.83 = 58,072.81/x
  3. Step 3: Cross multiply
    98,912.99x = 136,491.83 × 58,072.81
  4. Step 4: Simplify right side
    98,912.99x = 7,926,463,914.09
  5. Step 5: Solve for x
    x = 7,926,463,914.09/98,912.99
  6. Step 6: Final answer
    x = 80,135.73

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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.