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Finding the Fourth Proportional to 66,034.16, 91,113.12 and 39,185.40

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Solution

The fourth proportional to 66,034.16, 91,113.12 and 39,185.40 is: 54,067.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,034.16 : 91,113.12 = 39,185.40 : x
  2. Step 2: Convert to fraction form
    66,034.16/91,113.12 = 39,185.40/x
  3. Step 3: Cross multiply
    66,034.16x = 91,113.12 × 39,185.40
  4. Step 4: Simplify right side
    66,034.16x = 3,570,304,052.45
  5. Step 5: Solve for x
    x = 3,570,304,052.45/66,034.16
  6. Step 6: Final answer
    x = 54,067.54

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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.