Home / 87,221-138,338

Finding the Third Proportional to 87,221 and 138,338

Calculator

Solution

The third proportional to 87,221 and 138,338 is: 219,412.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,221 : 138,338 = 138,338 : x
  2. Step 2: Convert to fraction form
    87,221/138,338 = 138,338/x
  3. Step 3: Cross multiply
    87,221x = 138,338 × 138,338
  4. Step 4: Simplify right side
    87,221x = 19,137,402,244
  5. Step 5: Solve for x
    x = 19,137,402,244/87,221
  6. Step 6: Final answer
    x = 219,412.78

Related Problems

Find third proportional to 43,610.50 and 69,169
Half scale
Find third proportional to 174,442 and 276,676
Double scale
Find third proportional to 87,223 and 138,341
Similar ratio
Find third proportional to 130,831.50 and 207,507
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.