Home / 129,100-189,420

Finding the Third Proportional to 129,100 and 189,420

Calculator

Solution

The third proportional to 129,100 and 189,420 is: 277,923.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,100 : 189,420 = 189,420 : x
  2. Step 2: Convert to fraction form
    129,100/189,420 = 189,420/x
  3. Step 3: Cross multiply
    129,100x = 189,420 × 189,420
  4. Step 4: Simplify right side
    129,100x = 35,879,936,400
  5. Step 5: Solve for x
    x = 35,879,936,400/129,100
  6. Step 6: Final answer
    x = 277,923.60

Related Problems

Find third proportional to 64,550 and 94,710
Half scale
Find third proportional to 258,200 and 378,840
Double scale
Find third proportional to 129,102 and 189,423
Similar ratio
Find third proportional to 193,650 and 284,130
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.