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Finding the Fourth Proportional to 43,242.62, 64,816.54 and 16,918.43

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Solution

The fourth proportional to 43,242.62, 64,816.54 and 16,918.43 is: 25,359.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,242.62 : 64,816.54 = 16,918.43 : x
  2. Step 2: Convert to fraction form
    43,242.62/64,816.54 = 16,918.43/x
  3. Step 3: Cross multiply
    43,242.62x = 64,816.54 × 16,918.43
  4. Step 4: Simplify right side
    43,242.62x = 1,096,593,728.45
  5. Step 5: Solve for x
    x = 1,096,593,728.45/43,242.62
  6. Step 6: Final answer
    x = 25,359.10

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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.