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Finding the Fourth Proportional to 70,896.75, 97,836.90 and 39,065.42

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Solution

The fourth proportional to 70,896.75, 97,836.90 and 39,065.42 is: 53,909.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,896.75 : 97,836.90 = 39,065.42 : x
  2. Step 2: Convert to fraction form
    70,896.75/97,836.90 = 39,065.42/x
  3. Step 3: Cross multiply
    70,896.75x = 97,836.90 × 39,065.42
  4. Step 4: Simplify right side
    70,896.75x = 3,822,039,590.00
  5. Step 5: Solve for x
    x = 3,822,039,590.00/70,896.75
  6. Step 6: Final answer
    x = 53,909.94

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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.