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Finding the Fourth Proportional to 64,115.20, 96,172.80 and 36,467.20

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Solution

The fourth proportional to 64,115.20, 96,172.80 and 36,467.20 is: 54,700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,115.20 : 96,172.80 = 36,467.20 : x
  2. Step 2: Convert to fraction form
    64,115.20/96,172.80 = 36,467.20/x
  3. Step 3: Cross multiply
    64,115.20x = 96,172.80 × 36,467.20
  4. Step 4: Simplify right side
    64,115.20x = 3,507,152,732.16
  5. Step 5: Solve for x
    x = 3,507,152,732.16/64,115.20
  6. Step 6: Final answer
    x = 54,700.80

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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.