Home / 138,228-207,870

Finding the Third Proportional to 138,228 and 207,870

Calculator

Solution

The third proportional to 138,228 and 207,870 is: 312,599.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,228 : 207,870 = 207,870 : x
  2. Step 2: Convert to fraction form
    138,228/207,870 = 207,870/x
  3. Step 3: Cross multiply
    138,228x = 207,870 × 207,870
  4. Step 4: Simplify right side
    138,228x = 43,209,936,900
  5. Step 5: Solve for x
    x = 43,209,936,900/138,228
  6. Step 6: Final answer
    x = 312,599.02

Related Problems

Find third proportional to 69,114 and 103,935
Half scale
Find third proportional to 276,456 and 415,740
Double scale
Find third proportional to 138,230 and 207,873
Similar ratio
Find third proportional to 207,342 and 311,805
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.