Home / 68,860-145,920

Finding the Third Proportional to 68,860 and 145,920

Calculator

Solution

The third proportional to 68,860 and 145,920 is: 309,216.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,860 : 145,920 = 145,920 : x
  2. Step 2: Convert to fraction form
    68,860/145,920 = 145,920/x
  3. Step 3: Cross multiply
    68,860x = 145,920 × 145,920
  4. Step 4: Simplify right side
    68,860x = 21,292,646,400
  5. Step 5: Solve for x
    x = 21,292,646,400/68,860
  6. Step 6: Final answer
    x = 309,216.47

Related Problems

Find third proportional to 34,430 and 72,960
Half scale
Find third proportional to 137,720 and 291,840
Double scale
Find third proportional to 68,862 and 145,924
Similar ratio
Find third proportional to 103,290 and 218,880
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.