Home / 66,309-143,208

Finding the Third Proportional to 66,309 and 143,208

Calculator

Solution

The third proportional to 66,309 and 143,208 is: 309,287.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,309 : 143,208 = 143,208 : x
  2. Step 2: Convert to fraction form
    66,309/143,208 = 143,208/x
  3. Step 3: Cross multiply
    66,309x = 143,208 × 143,208
  4. Step 4: Simplify right side
    66,309x = 20,508,531,264
  5. Step 5: Solve for x
    x = 20,508,531,264/66,309
  6. Step 6: Final answer
    x = 309,287.30

Related Problems

Find third proportional to 33,154.50 and 71,604
Half scale
Find third proportional to 132,618 and 286,416
Double scale
Find third proportional to 66,311 and 143,212
Similar ratio
Find third proportional to 99,463.50 and 214,812
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.