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Finding the Fourth Proportional to 74,651.36, 103,020.11 and 40,660.50

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Solution

The fourth proportional to 74,651.36, 103,020.11 and 40,660.50 is: 56,112.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,651.36 : 103,020.11 = 40,660.50 : x
  2. Step 2: Convert to fraction form
    74,651.36/103,020.11 = 40,660.50/x
  3. Step 3: Cross multiply
    74,651.36x = 103,020.11 × 40,660.50
  4. Step 4: Simplify right side
    74,651.36x = 4,188,848,979.35
  5. Step 5: Solve for x
    x = 4,188,848,979.35/74,651.36
  6. Step 6: Final answer
    x = 56,112.16

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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.