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Finding the Fourth Proportional to 131,714.91, 181,855.60 and 86,469.83

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Solution

The fourth proportional to 131,714.91, 181,855.60 and 86,469.83 is: 119,386.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,714.91 : 181,855.60 = 86,469.83 : x
  2. Step 2: Convert to fraction form
    131,714.91/181,855.60 = 86,469.83/x
  3. Step 3: Cross multiply
    131,714.91x = 181,855.60 × 86,469.83
  4. Step 4: Simplify right side
    131,714.91x = 15,725,022,373.05
  5. Step 5: Solve for x
    x = 15,725,022,373.05/131,714.91
  6. Step 6: Final answer
    x = 119,386.81

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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.