Home / 31,678-68,378

Finding the Third Proportional to 31,678 and 68,378

Calculator

Solution

The third proportional to 31,678 and 68,378 is: 147,596.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,678 : 68,378 = 68,378 : x
  2. Step 2: Convert to fraction form
    31,678/68,378 = 68,378/x
  3. Step 3: Cross multiply
    31,678x = 68,378 × 68,378
  4. Step 4: Simplify right side
    31,678x = 4,675,550,884
  5. Step 5: Solve for x
    x = 4,675,550,884/31,678
  6. Step 6: Final answer
    x = 147,596.15

Related Problems

Find third proportional to 15,839 and 34,189
Half scale
Find third proportional to 63,356 and 136,756
Double scale
Find third proportional to 31,680 and 68,382
Similar ratio
Find third proportional to 47,517 and 102,567
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.