Home / 68,961-140,820

Finding the Third Proportional to 68,961 and 140,820

Calculator

Solution

The third proportional to 68,961 and 140,820 is: 287,557.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,961 : 140,820 = 140,820 : x
  2. Step 2: Convert to fraction form
    68,961/140,820 = 140,820/x
  3. Step 3: Cross multiply
    68,961x = 140,820 × 140,820
  4. Step 4: Simplify right side
    68,961x = 19,830,272,400
  5. Step 5: Solve for x
    x = 19,830,272,400/68,961
  6. Step 6: Final answer
    x = 287,557.78

Related Problems

Find third proportional to 34,480.50 and 70,410
Half scale
Find third proportional to 137,922 and 281,640
Double scale
Find third proportional to 68,963 and 140,824
Similar ratio
Find third proportional to 103,441.50 and 211,230
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.