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Finding the Fourth Proportional to 235,538.43, 353,093.82 and 85,672.77

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Solution

The fourth proportional to 235,538.43, 353,093.82 and 85,672.77 is: 128,431.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,538.43 : 353,093.82 = 85,672.77 : x
  2. Step 2: Convert to fraction form
    235,538.43/353,093.82 = 85,672.77/x
  3. Step 3: Cross multiply
    235,538.43x = 353,093.82 × 85,672.77
  4. Step 4: Simplify right side
    235,538.43x = 30,250,523,983.91
  5. Step 5: Solve for x
    x = 30,250,523,983.91/235,538.43
  6. Step 6: Final answer
    x = 128,431.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.