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Finding the Fourth Proportional to 201,785.53, 278,570.90 and 156,361.54

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Solution

The fourth proportional to 201,785.53, 278,570.90 and 156,361.54 is: 215,861.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,785.53 : 278,570.90 = 156,361.54 : x
  2. Step 2: Convert to fraction form
    201,785.53/278,570.90 = 156,361.54/x
  3. Step 3: Cross multiply
    201,785.53x = 278,570.90 × 156,361.54
  4. Step 4: Simplify right side
    201,785.53x = 43,557,773,444.95
  5. Step 5: Solve for x
    x = 43,557,773,444.95/201,785.53
  6. Step 6: Final answer
    x = 215,861.73

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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.