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Finding the Fourth Proportional to 86,906.16, 119,932.20 and 56,710.80

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Solution

The fourth proportional to 86,906.16, 119,932.20 and 56,710.80 is: 78,262.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,906.16 : 119,932.20 = 56,710.80 : x
  2. Step 2: Convert to fraction form
    86,906.16/119,932.20 = 56,710.80/x
  3. Step 3: Cross multiply
    86,906.16x = 119,932.20 × 56,710.80
  4. Step 4: Simplify right side
    86,906.16x = 6,801,451,007.76
  5. Step 5: Solve for x
    x = 6,801,451,007.76/86,906.16
  6. Step 6: Final answer
    x = 78,262.01

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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.