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Finding the Fourth Proportional to 185,694.88, 256,241.28 and 105,128.32

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Solution

The fourth proportional to 185,694.88, 256,241.28 and 105,128.32 is: 145,067.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,694.88 : 256,241.28 = 105,128.32 : x
  2. Step 2: Convert to fraction form
    185,694.88/256,241.28 = 105,128.32/x
  3. Step 3: Cross multiply
    185,694.88x = 256,241.28 × 105,128.32
  4. Step 4: Simplify right side
    185,694.88x = 26,938,215,281.05
  5. Step 5: Solve for x
    x = 26,938,215,281.05/185,694.88
  6. Step 6: Final answer
    x = 145,067.09

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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.