Home / 128,754-200,259

Finding the Third Proportional to 128,754 and 200,259

Calculator

Solution

The third proportional to 128,754 and 200,259 is: 311,475.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,754 : 200,259 = 200,259 : x
  2. Step 2: Convert to fraction form
    128,754/200,259 = 200,259/x
  3. Step 3: Cross multiply
    128,754x = 200,259 × 200,259
  4. Step 4: Simplify right side
    128,754x = 40,103,667,081
  5. Step 5: Solve for x
    x = 40,103,667,081/128,754
  6. Step 6: Final answer
    x = 311,475.12

Related Problems

Find third proportional to 64,377 and 100,129.50
Half scale
Find third proportional to 257,508 and 400,518
Double scale
Find third proportional to 128,756 and 200,262
Similar ratio
Find third proportional to 193,131 and 300,388.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.