Home / 77,128-156,402

Finding the Third Proportional to 77,128 and 156,402

Calculator

Solution

The third proportional to 77,128 and 156,402 is: 317,155.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,128 : 156,402 = 156,402 : x
  2. Step 2: Convert to fraction form
    77,128/156,402 = 156,402/x
  3. Step 3: Cross multiply
    77,128x = 156,402 × 156,402
  4. Step 4: Simplify right side
    77,128x = 24,461,585,604
  5. Step 5: Solve for x
    x = 24,461,585,604/77,128
  6. Step 6: Final answer
    x = 317,155.71

Related Problems

Find third proportional to 38,564 and 78,201
Half scale
Find third proportional to 154,256 and 312,804
Double scale
Find third proportional to 77,130 and 156,406
Similar ratio
Find third proportional to 115,692 and 234,603
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.