Home / 121,983.19-168,413.21-78,393.41

Finding the Fourth Proportional to 121,983.19, 168,413.21 and 78,393.41

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Solution

The fourth proportional to 121,983.19, 168,413.21 and 78,393.41 is: 108,232.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,983.19 : 168,413.21 = 78,393.41 : x
  2. Step 2: Convert to fraction form
    121,983.19/168,413.21 = 78,393.41/x
  3. Step 3: Cross multiply
    121,983.19x = 168,413.21 × 78,393.41
  4. Step 4: Simplify right side
    121,983.19x = 13,202,485,820.95
  5. Step 5: Solve for x
    x = 13,202,485,820.95/121,983.19
  6. Step 6: Final answer
    x = 108,232.01

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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.