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Finding the Fourth Proportional to 83,778.81, 115,495.79 and 66,632.73

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Solution

The fourth proportional to 83,778.81, 115,495.79 and 66,632.73 is: 91,858.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,778.81 : 115,495.79 = 66,632.73 : x
  2. Step 2: Convert to fraction form
    83,778.81/115,495.79 = 66,632.73/x
  3. Step 3: Cross multiply
    83,778.81x = 115,495.79 × 66,632.73
  4. Step 4: Simplify right side
    83,778.81x = 7,695,799,458.04
  5. Step 5: Solve for x
    x = 7,695,799,458.04/83,778.81
  6. Step 6: Final answer
    x = 91,858.54

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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.