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Finding the Fourth Proportional to 92,879.82, 128,213.39 and 62,706.01

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Solution

The fourth proportional to 92,879.82, 128,213.39 and 62,706.01 is: 86,560.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,879.82 : 128,213.39 = 62,706.01 : x
  2. Step 2: Convert to fraction form
    92,879.82/128,213.39 = 62,706.01/x
  3. Step 3: Cross multiply
    92,879.82x = 128,213.39 × 62,706.01
  4. Step 4: Simplify right side
    92,879.82x = 8,039,749,801.94
  5. Step 5: Solve for x
    x = 8,039,749,801.94/92,879.82
  6. Step 6: Final answer
    x = 86,560.78

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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.