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Finding the Fourth Proportional to 86,000.30, 128,745.30 and 63,911.60

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Solution

The fourth proportional to 86,000.30, 128,745.30 and 63,911.60 is: 95,677.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,000.30 : 128,745.30 = 63,911.60 : x
  2. Step 2: Convert to fraction form
    86,000.30/128,745.30 = 63,911.60/x
  3. Step 3: Cross multiply
    86,000.30x = 128,745.30 × 63,911.60
  4. Step 4: Simplify right side
    86,000.30x = 8,228,318,115.48
  5. Step 5: Solve for x
    x = 8,228,318,115.48/86,000.30
  6. Step 6: Final answer
    x = 95,677.78

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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.