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Finding the Fourth Proportional to 111,490.82, 153,878.56 and 66,193.64

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Solution

The fourth proportional to 111,490.82, 153,878.56 and 66,193.64 is: 91,359.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,490.82 : 153,878.56 = 66,193.64 : x
  2. Step 2: Convert to fraction form
    111,490.82/153,878.56 = 66,193.64/x
  3. Step 3: Cross multiply
    111,490.82x = 153,878.56 × 66,193.64
  4. Step 4: Simplify right side
    111,490.82x = 10,185,782,004.36
  5. Step 5: Solve for x
    x = 10,185,782,004.36/111,490.82
  6. Step 6: Final answer
    x = 91,359.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.