Home / 61,368-128,880

Finding the Third Proportional to 61,368 and 128,880

Calculator

Solution

The third proportional to 61,368 and 128,880 is: 270,663.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,368 : 128,880 = 128,880 : x
  2. Step 2: Convert to fraction form
    61,368/128,880 = 128,880/x
  3. Step 3: Cross multiply
    61,368x = 128,880 × 128,880
  4. Step 4: Simplify right side
    61,368x = 16,610,054,400
  5. Step 5: Solve for x
    x = 16,610,054,400/61,368
  6. Step 6: Final answer
    x = 270,663.12

Related Problems

Find third proportional to 30,684 and 64,440
Half scale
Find third proportional to 122,736 and 257,760
Double scale
Find third proportional to 61,370 and 128,884
Similar ratio
Find third proportional to 92,052 and 193,320
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.