Home / 128,466-139,923

Finding the Third Proportional to 128,466 and 139,923

Calculator

Solution

The third proportional to 128,466 and 139,923 is: 152,401.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,466 : 139,923 = 139,923 : x
  2. Step 2: Convert to fraction form
    128,466/139,923 = 139,923/x
  3. Step 3: Cross multiply
    128,466x = 139,923 × 139,923
  4. Step 4: Simplify right side
    128,466x = 19,578,445,929
  5. Step 5: Solve for x
    x = 19,578,445,929/128,466
  6. Step 6: Final answer
    x = 152,401.77

Related Problems

Find third proportional to 64,233 and 69,961.50
Half scale
Find third proportional to 256,932 and 279,846
Double scale
Find third proportional to 128,468 and 139,925
Similar ratio
Find third proportional to 192,699 and 209,884.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.