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Finding the Fourth Proportional to 74,979.60, 103,474.99 and 43,148.64

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Solution

The fourth proportional to 74,979.60, 103,474.99 and 43,148.64 is: 59,546.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,979.60 : 103,474.99 = 43,148.64 : x
  2. Step 2: Convert to fraction form
    74,979.60/103,474.99 = 43,148.64/x
  3. Step 3: Cross multiply
    74,979.60x = 103,474.99 × 43,148.64
  4. Step 4: Simplify right side
    74,979.60x = 4,464,805,092.51
  5. Step 5: Solve for x
    x = 4,464,805,092.51/74,979.60
  6. Step 6: Final answer
    x = 59,546.93

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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.