Home / 68,211-139,702

Finding the Third Proportional to 68,211 and 139,702

Calculator

Solution

The third proportional to 68,211 and 139,702 is: 286,121.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,211 : 139,702 = 139,702 : x
  2. Step 2: Convert to fraction form
    68,211/139,702 = 139,702/x
  3. Step 3: Cross multiply
    68,211x = 139,702 × 139,702
  4. Step 4: Simplify right side
    68,211x = 19,516,648,804
  5. Step 5: Solve for x
    x = 19,516,648,804/68,211
  6. Step 6: Final answer
    x = 286,121.72

Related Problems

Find third proportional to 34,105.50 and 69,851
Half scale
Find third proportional to 136,422 and 279,404
Double scale
Find third proportional to 68,213 and 139,706
Similar ratio
Find third proportional to 102,316.50 and 209,553
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.