Home / 66,131.78-99,198.48-19,385.60

Finding the Fourth Proportional to 66,131.78, 99,198.48 and 19,385.60

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Solution

The fourth proportional to 66,131.78, 99,198.48 and 19,385.60 is: 29,078.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,131.78 : 99,198.48 = 19,385.60 : x
  2. Step 2: Convert to fraction form
    66,131.78/99,198.48 = 19,385.60/x
  3. Step 3: Cross multiply
    66,131.78x = 99,198.48 × 19,385.60
  4. Step 4: Simplify right side
    66,131.78x = 1,923,022,053.89
  5. Step 5: Solve for x
    x = 1,923,022,053.89/66,131.78
  6. Step 6: Final answer
    x = 29,078.64

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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.