Home / 66,540.38-91,817.01-39,686.04

Finding the Fourth Proportional to 66,540.38, 91,817.01 and 39,686.04

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Solution

The fourth proportional to 66,540.38, 91,817.01 and 39,686.04 is: 54,761.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,540.38 : 91,817.01 = 39,686.04 : x
  2. Step 2: Convert to fraction form
    66,540.38/91,817.01 = 39,686.04/x
  3. Step 3: Cross multiply
    66,540.38x = 91,817.01 × 39,686.04
  4. Step 4: Simplify right side
    66,540.38x = 3,643,853,531.54
  5. Step 5: Solve for x
    x = 3,643,853,531.54/66,540.38
  6. Step 6: Final answer
    x = 54,761.54

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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.