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Finding the Fourth Proportional to 141,889.64, 195,801.12 and 81,418.88

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Solution

The fourth proportional to 141,889.64, 195,801.12 and 81,418.88 is: 112,354.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,889.64 : 195,801.12 = 81,418.88 : x
  2. Step 2: Convert to fraction form
    141,889.64/195,801.12 = 81,418.88/x
  3. Step 3: Cross multiply
    141,889.64x = 195,801.12 × 81,418.88
  4. Step 4: Simplify right side
    141,889.64x = 15,941,907,893.15
  5. Step 5: Solve for x
    x = 15,941,907,893.15/141,889.64
  6. Step 6: Final answer
    x = 112,354.28

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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.