Home / 138,836.73-191,583.86-78,413.43

Finding the Fourth Proportional to 138,836.73, 191,583.86 and 78,413.43

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Solution

The fourth proportional to 138,836.73, 191,583.86 and 78,413.43 is: 108,204.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,836.73 : 191,583.86 = 78,413.43 : x
  2. Step 2: Convert to fraction form
    138,836.73/191,583.86 = 78,413.43/x
  3. Step 3: Cross multiply
    138,836.73x = 191,583.86 × 78,413.43
  4. Step 4: Simplify right side
    138,836.73x = 15,022,747,203.17
  5. Step 5: Solve for x
    x = 15,022,747,203.17/138,836.73
  6. Step 6: Final answer
    x = 108,204.42

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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.