Home / 128,691-196,866

Finding the Third Proportional to 128,691 and 196,866

Calculator

Solution

The third proportional to 128,691 and 196,866 is: 301,157.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,691 : 196,866 = 196,866 : x
  2. Step 2: Convert to fraction form
    128,691/196,866 = 196,866/x
  3. Step 3: Cross multiply
    128,691x = 196,866 × 196,866
  4. Step 4: Simplify right side
    128,691x = 38,756,221,956
  5. Step 5: Solve for x
    x = 38,756,221,956/128,691
  6. Step 6: Final answer
    x = 301,157.21

Related Problems

Find third proportional to 64,345.50 and 98,433
Half scale
Find third proportional to 257,382 and 393,732
Double scale
Find third proportional to 128,693 and 196,869
Similar ratio
Find third proportional to 193,036.50 and 295,299
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.