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Finding the Fourth Proportional to 74,978.88, 103,429.92 and 48,091.48

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Solution

The fourth proportional to 74,978.88, 103,429.92 and 48,091.48 is: 66,339.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,978.88 : 103,429.92 = 48,091.48 : x
  2. Step 2: Convert to fraction form
    74,978.88/103,429.92 = 48,091.48/x
  3. Step 3: Cross multiply
    74,978.88x = 103,429.92 × 48,091.48
  4. Step 4: Simplify right side
    74,978.88x = 4,974,097,929.08
  5. Step 5: Solve for x
    x = 4,974,097,929.08/74,978.88
  6. Step 6: Final answer
    x = 66,339.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.