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Finding the Fourth Proportional to 157,781.70, 217,759.32 and 89,785.44

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Solution

The fourth proportional to 157,781.70, 217,759.32 and 89,785.44 is: 123,915.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,781.70 : 217,759.32 = 89,785.44 : x
  2. Step 2: Convert to fraction form
    157,781.70/217,759.32 = 89,785.44/x
  3. Step 3: Cross multiply
    157,781.70x = 217,759.32 × 89,785.44
  4. Step 4: Simplify right side
    157,781.70x = 19,551,616,360.30
  5. Step 5: Solve for x
    x = 19,551,616,360.30/157,781.70
  6. Step 6: Final answer
    x = 123,915.61

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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.