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Finding the Fourth Proportional to 74,392.38, 102,661.16 and 40,400.60

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Solution

The fourth proportional to 74,392.38, 102,661.16 and 40,400.60 is: 55,752.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,392.38 : 102,661.16 = 40,400.60 : x
  2. Step 2: Convert to fraction form
    74,392.38/102,661.16 = 40,400.60/x
  3. Step 3: Cross multiply
    74,392.38x = 102,661.16 × 40,400.60
  4. Step 4: Simplify right side
    74,392.38x = 4,147,571,745.39
  5. Step 5: Solve for x
    x = 4,147,571,745.39/74,392.38
  6. Step 6: Final answer
    x = 55,752.64

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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.