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Finding the Fourth Proportional to 74,703.92, 103,091.43 and 40,712.42

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Solution

The fourth proportional to 74,703.92, 103,091.43 and 40,712.42 is: 56,183.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,703.92 : 103,091.43 = 40,712.42 : x
  2. Step 2: Convert to fraction form
    74,703.92/103,091.43 = 40,712.42/x
  3. Step 3: Cross multiply
    74,703.92x = 103,091.43 × 40,712.42
  4. Step 4: Simplify right side
    74,703.92x = 4,197,100,877.54
  5. Step 5: Solve for x
    x = 4,197,100,877.54/74,703.92
  6. Step 6: Final answer
    x = 56,183.14

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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.