Home / 90.99-125.69-72.63

Finding the Fourth Proportional to 90.99, 125.69 and 72.63

Calculator

Solution

The fourth proportional to 90.99, 125.69 and 72.63 is: 100.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.99 : 125.69 = 72.63 : x
  2. Step 2: Convert to fraction form
    90.99/125.69 = 72.63/x
  3. Step 3: Cross multiply
    90.99x = 125.69 × 72.63
  4. Step 4: Simplify right side
    90.99x = 9,128.50
  5. Step 5: Solve for x
    x = 9,128.50/90.99
  6. Step 6: Final answer
    x = 100.32

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.