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Finding the Fourth Proportional to 66,485.88, 99,745.11 and 19,738.80

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Solution

The fourth proportional to 66,485.88, 99,745.11 and 19,738.80 is: 29,613.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,485.88 : 99,745.11 = 19,738.80 : x
  2. Step 2: Convert to fraction form
    66,485.88/99,745.11 = 19,738.80/x
  3. Step 3: Cross multiply
    66,485.88x = 99,745.11 × 19,738.80
  4. Step 4: Simplify right side
    66,485.88x = 1,968,848,777.27
  5. Step 5: Solve for x
    x = 1,968,848,777.27/66,485.88
  6. Step 6: Final answer
    x = 29,613.04

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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.