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Finding the Fourth Proportional to 68,741.40, 103,112.10 and 48,696.60

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Solution

The fourth proportional to 68,741.40, 103,112.10 and 48,696.60 is: 73,044.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,741.40 : 103,112.10 = 48,696.60 : x
  2. Step 2: Convert to fraction form
    68,741.40/103,112.10 = 48,696.60/x
  3. Step 3: Cross multiply
    68,741.40x = 103,112.10 × 48,696.60
  4. Step 4: Simplify right side
    68,741.40x = 5,021,208,688.86
  5. Step 5: Solve for x
    x = 5,021,208,688.86/68,741.40
  6. Step 6: Final answer
    x = 73,044.90

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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.