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Finding the Fourth Proportional to 74,619.92, 111,475.78 and 53,391.44

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Solution

The fourth proportional to 74,619.92, 111,475.78 and 53,391.44 is: 79,762.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,619.92 : 111,475.78 = 53,391.44 : x
  2. Step 2: Convert to fraction form
    74,619.92/111,475.78 = 53,391.44/x
  3. Step 3: Cross multiply
    74,619.92x = 111,475.78 × 53,391.44
  4. Step 4: Simplify right side
    74,619.92x = 5,951,852,419.32
  5. Step 5: Solve for x
    x = 5,951,852,419.32/74,619.92
  6. Step 6: Final answer
    x = 79,762.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.