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Finding the Fourth Proportional to 68,722.66, 103,020.55 and 47,672.63

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Solution

The fourth proportional to 68,722.66, 103,020.55 and 47,672.63 is: 71,464.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,722.66 : 103,020.55 = 47,672.63 : x
  2. Step 2: Convert to fraction form
    68,722.66/103,020.55 = 47,672.63/x
  3. Step 3: Cross multiply
    68,722.66x = 103,020.55 × 47,672.63
  4. Step 4: Simplify right side
    68,722.66x = 4,911,260,047.44
  5. Step 5: Solve for x
    x = 4,911,260,047.44/68,722.66
  6. Step 6: Final answer
    x = 71,464.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.