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Finding the Fourth Proportional to 70,000.85, 96,599.09 and 39,789.47

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Solution

The fourth proportional to 70,000.85, 96,599.09 and 39,789.47 is: 54,908.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,000.85 : 96,599.09 = 39,789.47 : x
  2. Step 2: Convert to fraction form
    70,000.85/96,599.09 = 39,789.47/x
  3. Step 3: Cross multiply
    70,000.85x = 96,599.09 × 39,789.47
  4. Step 4: Simplify right side
    70,000.85x = 3,843,625,911.64
  5. Step 5: Solve for x
    x = 3,843,625,911.64/70,000.85
  6. Step 6: Final answer
    x = 54,908.28

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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.