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Finding the Fourth Proportional to 62,660.35, 86,420.91 and 55,090.48

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Solution

The fourth proportional to 62,660.35, 86,420.91 and 55,090.48 is: 75,980.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,660.35 : 86,420.91 = 55,090.48 : x
  2. Step 2: Convert to fraction form
    62,660.35/86,420.91 = 55,090.48/x
  3. Step 3: Cross multiply
    62,660.35x = 86,420.91 × 55,090.48
  4. Step 4: Simplify right side
    62,660.35x = 4,760,969,413.94
  5. Step 5: Solve for x
    x = 4,760,969,413.94/62,660.35
  6. Step 6: Final answer
    x = 75,980.57

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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.