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Finding the Fourth Proportional to 71,891.28, 99,210.36 and 41,694.51

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Solution

The fourth proportional to 71,891.28, 99,210.36 and 41,694.51 is: 57,538.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,891.28 : 99,210.36 = 41,694.51 : x
  2. Step 2: Convert to fraction form
    71,891.28/99,210.36 = 41,694.51/x
  3. Step 3: Cross multiply
    71,891.28x = 99,210.36 × 41,694.51
  4. Step 4: Simplify right side
    71,891.28x = 4,136,526,642.60
  5. Step 5: Solve for x
    x = 4,136,526,642.60/71,891.28
  6. Step 6: Final answer
    x = 57,538.65

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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.