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Finding the Fourth Proportional to 128,181.42, 176,893.11 and 71,592.90

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Solution

The fourth proportional to 128,181.42, 176,893.11 and 71,592.90 is: 98,799.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,181.42 : 176,893.11 = 71,592.90 : x
  2. Step 2: Convert to fraction form
    128,181.42/176,893.11 = 71,592.90/x
  3. Step 3: Cross multiply
    128,181.42x = 176,893.11 × 71,592.90
  4. Step 4: Simplify right side
    128,181.42x = 12,664,290,734.92
  5. Step 5: Solve for x
    x = 12,664,290,734.92/128,181.42
  6. Step 6: Final answer
    x = 98,799.74

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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.