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Finding the Fourth Proportional to 66,203.94, 91,361.16 and 38,995.85

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Solution

The fourth proportional to 66,203.94, 91,361.16 and 38,995.85 is: 53,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,203.94 : 91,361.16 = 38,995.85 : x
  2. Step 2: Convert to fraction form
    66,203.94/91,361.16 = 38,995.85/x
  3. Step 3: Cross multiply
    66,203.94x = 91,361.16 × 38,995.85
  4. Step 4: Simplify right side
    66,203.94x = 3,562,705,634.38
  5. Step 5: Solve for x
    x = 3,562,705,634.38/66,203.94
  6. Step 6: Final answer
    x = 53,814.10

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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.