Home / 138,780-219,540

Finding the Third Proportional to 138,780 and 219,540

Calculator

Solution

The third proportional to 138,780 and 219,540 is: 347,296.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,780 : 219,540 = 219,540 : x
  2. Step 2: Convert to fraction form
    138,780/219,540 = 219,540/x
  3. Step 3: Cross multiply
    138,780x = 219,540 × 219,540
  4. Step 4: Simplify right side
    138,780x = 48,197,811,600
  5. Step 5: Solve for x
    x = 48,197,811,600/138,780
  6. Step 6: Final answer
    x = 347,296.52

Related Problems

Find third proportional to 69,390 and 109,770
Half scale
Find third proportional to 277,560 and 439,080
Double scale
Find third proportional to 138,782 and 219,543
Similar ratio
Find third proportional to 208,170 and 329,310
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.