Home / 58,515-128,142

Finding the Third Proportional to 58,515 and 128,142

Calculator

Solution

The third proportional to 58,515 and 128,142 is: 280,618.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,515 : 128,142 = 128,142 : x
  2. Step 2: Convert to fraction form
    58,515/128,142 = 128,142/x
  3. Step 3: Cross multiply
    58,515x = 128,142 × 128,142
  4. Step 4: Simplify right side
    58,515x = 16,420,372,164
  5. Step 5: Solve for x
    x = 16,420,372,164/58,515
  6. Step 6: Final answer
    x = 280,618.17

Related Problems

Find third proportional to 29,257.50 and 64,071
Half scale
Find third proportional to 117,030 and 256,284
Double scale
Find third proportional to 58,517 and 128,146
Similar ratio
Find third proportional to 87,772.50 and 192,213
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.