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Finding the Fourth Proportional to 65,709.20, 98,563.80 and 16,461.20

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Solution

The fourth proportional to 65,709.20, 98,563.80 and 16,461.20 is: 24,691.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,709.20 : 98,563.80 = 16,461.20 : x
  2. Step 2: Convert to fraction form
    65,709.20/98,563.80 = 16,461.20/x
  3. Step 3: Cross multiply
    65,709.20x = 98,563.80 × 16,461.20
  4. Step 4: Simplify right side
    65,709.20x = 1,622,478,424.56
  5. Step 5: Solve for x
    x = 1,622,478,424.56/65,709.20
  6. Step 6: Final answer
    x = 24,691.80

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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.