Home / 129,215-189,570

Finding the Third Proportional to 129,215 and 189,570

Calculator

Solution

The third proportional to 129,215 and 189,570 is: 278,116.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,215 : 189,570 = 189,570 : x
  2. Step 2: Convert to fraction form
    129,215/189,570 = 189,570/x
  3. Step 3: Cross multiply
    129,215x = 189,570 × 189,570
  4. Step 4: Simplify right side
    129,215x = 35,936,784,900
  5. Step 5: Solve for x
    x = 35,936,784,900/129,215
  6. Step 6: Final answer
    x = 278,116.20

Related Problems

Find third proportional to 64,607.50 and 94,785
Half scale
Find third proportional to 258,430 and 379,140
Double scale
Find third proportional to 129,217 and 189,573
Similar ratio
Find third proportional to 193,822.50 and 284,355
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.