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Finding the Fourth Proportional to 91,694.84, 126,559.87 and 53,990.96

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Solution

The fourth proportional to 91,694.84, 126,559.87 and 53,990.96 is: 74,519.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,694.84 : 126,559.87 = 53,990.96 : x
  2. Step 2: Convert to fraction form
    91,694.84/126,559.87 = 53,990.96/x
  3. Step 3: Cross multiply
    91,694.84x = 126,559.87 × 53,990.96
  4. Step 4: Simplify right side
    91,694.84x = 6,833,088,111.00
  5. Step 5: Solve for x
    x = 6,833,088,111.00/91,694.84
  6. Step 6: Final answer
    x = 74,519.88

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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.