Home / 128,436-170,470

Finding the Third Proportional to 128,436 and 170,470

Calculator

Solution

The third proportional to 128,436 and 170,470 is: 226,260.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,436 : 170,470 = 170,470 : x
  2. Step 2: Convert to fraction form
    128,436/170,470 = 170,470/x
  3. Step 3: Cross multiply
    128,436x = 170,470 × 170,470
  4. Step 4: Simplify right side
    128,436x = 29,060,020,900
  5. Step 5: Solve for x
    x = 29,060,020,900/128,436
  6. Step 6: Final answer
    x = 226,260.71

Related Problems

Find third proportional to 64,218 and 85,235
Half scale
Find third proportional to 256,872 and 340,940
Double scale
Find third proportional to 128,438 and 170,473
Similar ratio
Find third proportional to 192,654 and 255,705
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.