Home / 61,090-128,740

Finding the Third Proportional to 61,090 and 128,740

Calculator

Solution

The third proportional to 61,090 and 128,740 is: 271,304.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,090 : 128,740 = 128,740 : x
  2. Step 2: Convert to fraction form
    61,090/128,740 = 128,740/x
  3. Step 3: Cross multiply
    61,090x = 128,740 × 128,740
  4. Step 4: Simplify right side
    61,090x = 16,573,987,600
  5. Step 5: Solve for x
    x = 16,573,987,600/61,090
  6. Step 6: Final answer
    x = 271,304.43

Related Problems

Find third proportional to 30,545 and 64,370
Half scale
Find third proportional to 122,180 and 257,480
Double scale
Find third proportional to 61,092 and 128,744
Similar ratio
Find third proportional to 91,635 and 193,110
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.