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Finding the Fourth Proportional to 78,588.66, 117,917.64 and 44,853.28

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Solution

The fourth proportional to 78,588.66, 117,917.64 and 44,853.28 is: 67,299.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,588.66 : 117,917.64 = 44,853.28 : x
  2. Step 2: Convert to fraction form
    78,588.66/117,917.64 = 44,853.28/x
  3. Step 3: Cross multiply
    78,588.66x = 117,917.64 × 44,853.28
  4. Step 4: Simplify right side
    78,588.66x = 5,288,992,629.07
  5. Step 5: Solve for x
    x = 5,288,992,629.07/78,588.66
  6. Step 6: Final answer
    x = 67,299.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.