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Finding the Fourth Proportional to 64,519.53, 96,782.12 and 20,147.12

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Solution

The fourth proportional to 64,519.53, 96,782.12 and 20,147.12 is: 30,221.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,519.53 : 96,782.12 = 20,147.12 : x
  2. Step 2: Convert to fraction form
    64,519.53/96,782.12 = 20,147.12/x
  3. Step 3: Cross multiply
    64,519.53x = 96,782.12 × 20,147.12
  4. Step 4: Simplify right side
    64,519.53x = 1,949,880,985.49
  5. Step 5: Solve for x
    x = 1,949,880,985.49/64,519.53
  6. Step 6: Final answer
    x = 30,221.56

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1.5x scale

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.