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Finding the Fourth Proportional to 91,393.81, 125,843.07 and 79,999.54

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Solution

The fourth proportional to 91,393.81, 125,843.07 and 79,999.54 is: 110,153.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,393.81 : 125,843.07 = 79,999.54 : x
  2. Step 2: Convert to fraction form
    91,393.81/125,843.07 = 79,999.54/x
  3. Step 3: Cross multiply
    91,393.81x = 125,843.07 × 79,999.54
  4. Step 4: Simplify right side
    91,393.81x = 10,067,387,712.19
  5. Step 5: Solve for x
    x = 10,067,387,712.19/91,393.81
  6. Step 6: Final answer
    x = 110,153.93

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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.