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Finding the Fourth Proportional to 117,137.63, 161,649.20 and 63,422.48

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Solution

The fourth proportional to 117,137.63, 161,649.20 and 63,422.48 is: 87,522.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,137.63 : 161,649.20 = 63,422.48 : x
  2. Step 2: Convert to fraction form
    117,137.63/161,649.20 = 63,422.48/x
  3. Step 3: Cross multiply
    117,137.63x = 161,649.20 × 63,422.48
  4. Step 4: Simplify right side
    117,137.63x = 10,252,193,716.70
  5. Step 5: Solve for x
    x = 10,252,193,716.70/117,137.63
  6. Step 6: Final answer
    x = 87,522.63

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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.