Home / 56,787-87,840

Finding the Third Proportional to 56,787 and 87,840

Calculator

Solution

The third proportional to 56,787 and 87,840 is: 135,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,787 : 87,840 = 87,840 : x
  2. Step 2: Convert to fraction form
    56,787/87,840 = 87,840/x
  3. Step 3: Cross multiply
    56,787x = 87,840 × 87,840
  4. Step 4: Simplify right side
    56,787x = 7,715,865,600
  5. Step 5: Solve for x
    x = 7,715,865,600/56,787
  6. Step 6: Final answer
    x = 135,873.80

Related Problems

Find third proportional to 28,393.50 and 43,920
Half scale
Find third proportional to 113,574 and 175,680
Double scale
Find third proportional to 56,789 and 87,843
Similar ratio
Find third proportional to 85,180.50 and 131,760
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.