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Finding the Fourth Proportional to 79,474.50, 109,689.39 and 45,940.50

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Solution

The fourth proportional to 79,474.50, 109,689.39 and 45,940.50 is: 63,406.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,474.50 : 109,689.39 = 45,940.50 : x
  2. Step 2: Convert to fraction form
    79,474.50/109,689.39 = 45,940.50/x
  3. Step 3: Cross multiply
    79,474.50x = 109,689.39 × 45,940.50
  4. Step 4: Simplify right side
    79,474.50x = 5,039,185,421.30
  5. Step 5: Solve for x
    x = 5,039,185,421.30/79,474.50
  6. Step 6: Final answer
    x = 63,406.32

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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.