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Finding the Fourth Proportional to 86,011.96, 128,951.70 and 26,812.60

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Solution

The fourth proportional to 86,011.96, 128,951.70 and 26,812.60 is: 40,198.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,011.96 : 128,951.70 = 26,812.60 : x
  2. Step 2: Convert to fraction form
    86,011.96/128,951.70 = 26,812.60/x
  3. Step 3: Cross multiply
    86,011.96x = 128,951.70 × 26,812.60
  4. Step 4: Simplify right side
    86,011.96x = 3,457,530,351.42
  5. Step 5: Solve for x
    x = 3,457,530,351.42/86,011.96
  6. Step 6: Final answer
    x = 40,198.25

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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.