Home / 64,862-139,840

Finding the Third Proportional to 64,862 and 139,840

Calculator

Solution

The third proportional to 64,862 and 139,840 is: 301,489.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,862 : 139,840 = 139,840 : x
  2. Step 2: Convert to fraction form
    64,862/139,840 = 139,840/x
  3. Step 3: Cross multiply
    64,862x = 139,840 × 139,840
  4. Step 4: Simplify right side
    64,862x = 19,555,225,600
  5. Step 5: Solve for x
    x = 19,555,225,600/64,862
  6. Step 6: Final answer
    x = 301,489.71

Related Problems

Find third proportional to 32,431 and 69,920
Half scale
Find third proportional to 129,724 and 279,680
Double scale
Find third proportional to 64,864 and 139,844
Similar ratio
Find third proportional to 97,293 and 209,760
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.