Home / 77,760-120,636

Finding the Third Proportional to 77,760 and 120,636

Calculator

Solution

The third proportional to 77,760 and 120,636 is: 187,153.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,760 : 120,636 = 120,636 : x
  2. Step 2: Convert to fraction form
    77,760/120,636 = 120,636/x
  3. Step 3: Cross multiply
    77,760x = 120,636 × 120,636
  4. Step 4: Simplify right side
    77,760x = 14,553,044,496
  5. Step 5: Solve for x
    x = 14,553,044,496/77,760
  6. Step 6: Final answer
    x = 187,153.35

Related Problems

Find third proportional to 38,880 and 60,318
Half scale
Find third proportional to 155,520 and 241,272
Double scale
Find third proportional to 77,762 and 120,639
Similar ratio
Find third proportional to 116,640 and 180,954
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.