Home / 68,640-140,625.75

Finding the Third Proportional to 68,640 and 140,625.75

Calculator

Solution

The third proportional to 68,640 and 140,625.75 is: 288,106.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,640 : 140,625.75 = 140,625.75 : x
  2. Step 2: Convert to fraction form
    68,640/140,625.75 = 140,625.75/x
  3. Step 3: Cross multiply
    68,640x = 140,625.75 × 140,625.75
  4. Step 4: Simplify right side
    68,640x = 19,775,601,563.06
  5. Step 5: Solve for x
    x = 19,775,601,563.06/68,640
  6. Step 6: Final answer
    x = 288,106.08

Related Problems

Find third proportional to 34,320 and 70,312.88
Half scale
Find third proportional to 137,280 and 281,251.50
Double scale
Find third proportional to 68,642 and 140,630
Similar ratio
Find third proportional to 102,960 and 210,938.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.