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Finding the Fourth Proportional to 72,935.64, 100,649.79 and 41,103.90

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Solution

The fourth proportional to 72,935.64, 100,649.79 and 41,103.90 is: 56,722.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,935.64 : 100,649.79 = 41,103.90 : x
  2. Step 2: Convert to fraction form
    72,935.64/100,649.79 = 41,103.90/x
  3. Step 3: Cross multiply
    72,935.64x = 100,649.79 × 41,103.90
  4. Step 4: Simplify right side
    72,935.64x = 4,137,098,903.18
  5. Step 5: Solve for x
    x = 4,137,098,903.18/72,935.64
  6. Step 6: Final answer
    x = 56,722.60

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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.