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Finding the Fourth Proportional to 74,391.80, 102,661.02 and 40,400.54

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Solution

The fourth proportional to 74,391.80, 102,661.02 and 40,400.54 is: 55,752.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,391.80 : 102,661.02 = 40,400.54 : x
  2. Step 2: Convert to fraction form
    74,391.80/102,661.02 = 40,400.54/x
  3. Step 3: Cross multiply
    74,391.80x = 102,661.02 × 40,400.54
  4. Step 4: Simplify right side
    74,391.80x = 4,147,560,644.95
  5. Step 5: Solve for x
    x = 4,147,560,644.95/74,391.80
  6. Step 6: Final answer
    x = 55,752.93

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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.