Home / 100,487-138,423

Finding the Third Proportional to 100,487 and 138,423

Calculator

Solution

The third proportional to 100,487 and 138,423 is: 190,680.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,487 : 138,423 = 138,423 : x
  2. Step 2: Convert to fraction form
    100,487/138,423 = 138,423/x
  3. Step 3: Cross multiply
    100,487x = 138,423 × 138,423
  4. Step 4: Simplify right side
    100,487x = 19,160,926,929
  5. Step 5: Solve for x
    x = 19,160,926,929/100,487
  6. Step 6: Final answer
    x = 190,680.65

Related Problems

Find third proportional to 50,243.50 and 69,211.50
Half scale
Find third proportional to 200,974 and 276,846
Double scale
Find third proportional to 100,489 and 138,426
Similar ratio
Find third proportional to 150,730.50 and 207,634.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.