Home / 345,821-518,731.50-83,165

Finding the Fourth Proportional to 345,821, 518,731.50 and 83,165

Calculator

Solution

The fourth proportional to 345,821, 518,731.50 and 83,165 is: 124,747.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,821 : 518,731.50 = 83,165 : x
  2. Step 2: Convert to fraction form
    345,821/518,731.50 = 83,165/x
  3. Step 3: Cross multiply
    345,821x = 518,731.50 × 83,165
  4. Step 4: Simplify right side
    345,821x = 43,140,305,197.50
  5. Step 5: Solve for x
    x = 43,140,305,197.50/345,821
  6. Step 6: Final answer
    x = 124,747.50

Related Problems

Find fourth proportional to 172,910.50, 259,365.75 and 41,582.50
Half scale
Find fourth proportional to 691,642, 1,037,463 and 166,330
Double scale
Find fourth proportional to 345,822, 518,733 and 83,166
Similar ratio
Find fourth proportional to 518,731.50, 778,097.25 and 124,747.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.