Home / 138,870-207,395

Finding the Third Proportional to 138,870 and 207,395

Calculator

Solution

The third proportional to 138,870 and 207,395 is: 309,733.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,870 : 207,395 = 207,395 : x
  2. Step 2: Convert to fraction form
    138,870/207,395 = 207,395/x
  3. Step 3: Cross multiply
    138,870x = 207,395 × 207,395
  4. Step 4: Simplify right side
    138,870x = 43,012,686,025
  5. Step 5: Solve for x
    x = 43,012,686,025/138,870
  6. Step 6: Final answer
    x = 309,733.46

Related Problems

Find third proportional to 69,435 and 103,697.50
Half scale
Find third proportional to 277,740 and 414,790
Double scale
Find third proportional to 138,872 and 207,398
Similar ratio
Find third proportional to 208,305 and 311,092.50
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.