Home / 69,128-145,372

Finding the Third Proportional to 69,128 and 145,372

Calculator

Solution

The third proportional to 69,128 and 145,372 is: 305,708.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,128 : 145,372 = 145,372 : x
  2. Step 2: Convert to fraction form
    69,128/145,372 = 145,372/x
  3. Step 3: Cross multiply
    69,128x = 145,372 × 145,372
  4. Step 4: Simplify right side
    69,128x = 21,133,018,384
  5. Step 5: Solve for x
    x = 21,133,018,384/69,128
  6. Step 6: Final answer
    x = 305,708.52

Related Problems

Find third proportional to 34,564 and 72,686
Half scale
Find third proportional to 138,256 and 290,744
Double scale
Find third proportional to 69,130 and 145,376
Similar ratio
Find third proportional to 103,692 and 218,058
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.