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Finding the Fourth Proportional to 86,192.85, 128,997.68 and 86,192.85

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Solution

The fourth proportional to 86,192.85, 128,997.68 and 86,192.85 is: 128,997.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,192.85 : 128,997.68 = 86,192.85 : x
  2. Step 2: Convert to fraction form
    86,192.85/128,997.68 = 86,192.85/x
  3. Step 3: Cross multiply
    86,192.85x = 128,997.68 × 86,192.85
  4. Step 4: Simplify right side
    86,192.85x = 11,118,677,251.62
  5. Step 5: Solve for x
    x = 11,118,677,251.62/86,192.85
  6. Step 6: Final answer
    x = 128,997.68

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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.