Home / 138,688-198,188

Finding the Third Proportional to 138,688 and 198,188

Calculator

Solution

The third proportional to 138,688 and 198,188 is: 283,214.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,688 : 198,188 = 198,188 : x
  2. Step 2: Convert to fraction form
    138,688/198,188 = 198,188/x
  3. Step 3: Cross multiply
    138,688x = 198,188 × 198,188
  4. Step 4: Simplify right side
    138,688x = 39,278,483,344
  5. Step 5: Solve for x
    x = 39,278,483,344/138,688
  6. Step 6: Final answer
    x = 283,214.72

Related Problems

Find third proportional to 69,344 and 99,094
Half scale
Find third proportional to 277,376 and 396,376
Double scale
Find third proportional to 138,690 and 198,191
Similar ratio
Find third proportional to 208,032 and 297,282
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.