Home / 66,690-145,772

Finding the Third Proportional to 66,690 and 145,772

Calculator

Solution

The third proportional to 66,690 and 145,772 is: 318,630.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,690 : 145,772 = 145,772 : x
  2. Step 2: Convert to fraction form
    66,690/145,772 = 145,772/x
  3. Step 3: Cross multiply
    66,690x = 145,772 × 145,772
  4. Step 4: Simplify right side
    66,690x = 21,249,475,984
  5. Step 5: Solve for x
    x = 21,249,475,984/66,690
  6. Step 6: Final answer
    x = 318,630.62

Related Problems

Find third proportional to 33,345 and 72,886
Half scale
Find third proportional to 133,380 and 291,544
Double scale
Find third proportional to 66,692 and 145,776
Similar ratio
Find third proportional to 100,035 and 218,658
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.