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Finding the Fourth Proportional to 65,728.80, 98,593.20 and 37,735.20

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Solution

The fourth proportional to 65,728.80, 98,593.20 and 37,735.20 is: 56,602.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,728.80 : 98,593.20 = 37,735.20 : x
  2. Step 2: Convert to fraction form
    65,728.80/98,593.20 = 37,735.20/x
  3. Step 3: Cross multiply
    65,728.80x = 98,593.20 × 37,735.20
  4. Step 4: Simplify right side
    65,728.80x = 3,720,434,120.64
  5. Step 5: Solve for x
    x = 3,720,434,120.64/65,728.80
  6. Step 6: Final answer
    x = 56,602.80

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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.