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Finding the Fourth Proportional to 73,716.66, 110,578.77 and 21,126.60

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Solution

The fourth proportional to 73,716.66, 110,578.77 and 21,126.60 is: 31,690.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,716.66 : 110,578.77 = 21,126.60 : x
  2. Step 2: Convert to fraction form
    73,716.66/110,578.77 = 21,126.60/x
  3. Step 3: Cross multiply
    73,716.66x = 110,578.77 × 21,126.60
  4. Step 4: Simplify right side
    73,716.66x = 2,336,153,442.28
  5. Step 5: Solve for x
    x = 2,336,153,442.28/73,716.66
  6. Step 6: Final answer
    x = 31,690.98

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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.