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Finding the Fourth Proportional to 62,872.85, 86,762.80 and 34,578.54

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Solution

The fourth proportional to 62,872.85, 86,762.80 and 34,578.54 is: 47,717.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,872.85 : 86,762.80 = 34,578.54 : x
  2. Step 2: Convert to fraction form
    62,872.85/86,762.80 = 34,578.54/x
  3. Step 3: Cross multiply
    62,872.85x = 86,762.80 × 34,578.54
  4. Step 4: Simplify right side
    62,872.85x = 3,000,130,863.87
  5. Step 5: Solve for x
    x = 3,000,130,863.87/62,872.85
  6. Step 6: Final answer
    x = 47,717.43

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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.