Home / 139,720-221,396

Finding the Third Proportional to 139,720 and 221,396

Calculator

Solution

The third proportional to 139,720 and 221,396 is: 350,817.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,720 : 221,396 = 221,396 : x
  2. Step 2: Convert to fraction form
    139,720/221,396 = 221,396/x
  3. Step 3: Cross multiply
    139,720x = 221,396 × 221,396
  4. Step 4: Simplify right side
    139,720x = 49,016,188,816
  5. Step 5: Solve for x
    x = 49,016,188,816/139,720
  6. Step 6: Final answer
    x = 350,817.27

Related Problems

Find third proportional to 69,860 and 110,698
Half scale
Find third proportional to 279,440 and 442,792
Double scale
Find third proportional to 139,722 and 221,399
Similar ratio
Find third proportional to 209,580 and 332,094
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.