Home / 121,786.20-182,679.30-77,608.80

Finding the Fourth Proportional to 121,786.20, 182,679.30 and 77,608.80

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Solution

The fourth proportional to 121,786.20, 182,679.30 and 77,608.80 is: 116,413.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,786.20 : 182,679.30 = 77,608.80 : x
  2. Step 2: Convert to fraction form
    121,786.20/182,679.30 = 77,608.80/x
  3. Step 3: Cross multiply
    121,786.20x = 182,679.30 × 77,608.80
  4. Step 4: Simplify right side
    121,786.20x = 14,177,521,257.84
  5. Step 5: Solve for x
    x = 14,177,521,257.84/121,786.20
  6. Step 6: Final answer
    x = 116,413.20

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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.