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Finding the Fourth Proportional to 87,007.20, 130,413.60 and 37,078.80

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Solution

The fourth proportional to 87,007.20, 130,413.60 and 37,078.80 is: 55,576.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,007.20 : 130,413.60 = 37,078.80 : x
  2. Step 2: Convert to fraction form
    87,007.20/130,413.60 = 37,078.80/x
  3. Step 3: Cross multiply
    87,007.20x = 130,413.60 × 37,078.80
  4. Step 4: Simplify right side
    87,007.20x = 4,835,579,791.68
  5. Step 5: Solve for x
    x = 4,835,579,791.68/87,007.20
  6. Step 6: Final answer
    x = 55,576.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.