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Finding the Fourth Proportional to 71,731.20, 107,467.20 and 61,363.20

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Solution

The fourth proportional to 71,731.20, 107,467.20 and 61,363.20 is: 91,933.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,731.20 : 107,467.20 = 61,363.20 : x
  2. Step 2: Convert to fraction form
    71,731.20/107,467.20 = 61,363.20/x
  3. Step 3: Cross multiply
    71,731.20x = 107,467.20 × 61,363.20
  4. Step 4: Simplify right side
    71,731.20x = 6,594,531,287.04
  5. Step 5: Solve for x
    x = 6,594,531,287.04/71,731.20
  6. Step 6: Final answer
    x = 91,933.93

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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.