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Finding the Fourth Proportional to 81,161.82, 112,146.39 and 62,460.54

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Solution

The fourth proportional to 81,161.82, 112,146.39 and 62,460.54 is: 86,305.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,161.82 : 112,146.39 = 62,460.54 : x
  2. Step 2: Convert to fraction form
    81,161.82/112,146.39 = 62,460.54/x
  3. Step 3: Cross multiply
    81,161.82x = 112,146.39 × 62,460.54
  4. Step 4: Simplify right side
    81,161.82x = 7,004,724,078.45
  5. Step 5: Solve for x
    x = 7,004,724,078.45/81,161.82
  6. Step 6: Final answer
    x = 86,305.66

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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.