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Finding the Fourth Proportional to 62,978.24, 86,917.92 and 36,120.17

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Solution

The fourth proportional to 62,978.24, 86,917.92 and 36,120.17 is: 49,850.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,978.24 : 86,917.92 = 36,120.17 : x
  2. Step 2: Convert to fraction form
    62,978.24/86,917.92 = 36,120.17/x
  3. Step 3: Cross multiply
    62,978.24x = 86,917.92 × 36,120.17
  4. Step 4: Simplify right side
    62,978.24x = 3,139,490,263.74
  5. Step 5: Solve for x
    x = 3,139,490,263.74/62,978.24
  6. Step 6: Final answer
    x = 49,850.39

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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.