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Finding the Fourth Proportional to 76,142.94, 104,976.59 and 62,480.94

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Solution

The fourth proportional to 76,142.94, 104,976.59 and 62,480.94 is: 86,141.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,142.94 : 104,976.59 = 62,480.94 : x
  2. Step 2: Convert to fraction form
    76,142.94/104,976.59 = 62,480.94/x
  3. Step 3: Cross multiply
    76,142.94x = 104,976.59 × 62,480.94
  4. Step 4: Simplify right side
    76,142.94x = 6,559,035,708.79
  5. Step 5: Solve for x
    x = 6,559,035,708.79/76,142.94
  6. Step 6: Final answer
    x = 86,141.09

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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.