Home / 78,720-115,152

Finding the Third Proportional to 78,720 and 115,152

Calculator

Solution

The third proportional to 78,720 and 115,152 is: 168,444.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720 : 115,152 = 115,152 : x
  2. Step 2: Convert to fraction form
    78,720/115,152 = 115,152/x
  3. Step 3: Cross multiply
    78,720x = 115,152 × 115,152
  4. Step 4: Simplify right side
    78,720x = 13,259,983,104
  5. Step 5: Solve for x
    x = 13,259,983,104/78,720
  6. Step 6: Final answer
    x = 168,444.91

Related Problems

Find third proportional to 39,360 and 57,576
Half scale
Find third proportional to 157,440 and 230,304
Double scale
Find third proportional to 78,722 and 115,155
Similar ratio
Find third proportional to 118,080 and 172,728
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.