Home / 86,220-128,799

Finding the Third Proportional to 86,220 and 128,799

Calculator

Solution

The third proportional to 86,220 and 128,799 is: 192,405.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,220 : 128,799 = 128,799 : x
  2. Step 2: Convert to fraction form
    86,220/128,799 = 128,799/x
  3. Step 3: Cross multiply
    86,220x = 128,799 × 128,799
  4. Step 4: Simplify right side
    86,220x = 16,589,182,401
  5. Step 5: Solve for x
    x = 16,589,182,401/86,220
  6. Step 6: Final answer
    x = 192,405.27

Related Problems

Find third proportional to 43,110 and 64,399.50
Half scale
Find third proportional to 172,440 and 257,598
Double scale
Find third proportional to 86,222 and 128,802
Similar ratio
Find third proportional to 129,330 and 193,198.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.