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Finding the Fourth Proportional to 74,991.56, 103,494.75 and 42,736.04

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Solution

The fourth proportional to 74,991.56, 103,494.75 and 42,736.04 is: 58,979.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,991.56 : 103,494.75 = 42,736.04 : x
  2. Step 2: Convert to fraction form
    74,991.56/103,494.75 = 42,736.04/x
  3. Step 3: Cross multiply
    74,991.56x = 103,494.75 × 42,736.04
  4. Step 4: Simplify right side
    74,991.56x = 4,422,956,141.37
  5. Step 5: Solve for x
    x = 4,422,956,141.37/74,991.56
  6. Step 6: Final answer
    x = 58,979.39

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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.