Home / 81,129-121,018

Finding the Third Proportional to 81,129 and 121,018

Calculator

Solution

The third proportional to 81,129 and 121,018 is: 180,519.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129 : 121,018 = 121,018 : x
  2. Step 2: Convert to fraction form
    81,129/121,018 = 121,018/x
  3. Step 3: Cross multiply
    81,129x = 121,018 × 121,018
  4. Step 4: Simplify right side
    81,129x = 14,645,356,324
  5. Step 5: Solve for x
    x = 14,645,356,324/81,129
  6. Step 6: Final answer
    x = 180,519.37

Related Problems

Find third proportional to 40,564.50 and 60,509
Half scale
Find third proportional to 162,258 and 242,036
Double scale
Find third proportional to 81,131 and 121,021
Similar ratio
Find third proportional to 121,693.50 and 181,527
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.