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Finding the Fourth Proportional to 81,913.80, 113,040.80 and 46,103.81

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Solution

The fourth proportional to 81,913.80, 113,040.80 and 46,103.81 is: 63,623.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,913.80 : 113,040.80 = 46,103.81 : x
  2. Step 2: Convert to fraction form
    81,913.80/113,040.80 = 46,103.81/x
  3. Step 3: Cross multiply
    81,913.80x = 113,040.80 × 46,103.81
  4. Step 4: Simplify right side
    81,913.80x = 5,211,610,942.61
  5. Step 5: Solve for x
    x = 5,211,610,942.61/81,913.80
  6. Step 6: Final answer
    x = 63,623.11

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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.