Home / 108.74-149.92-90.32

Finding the Fourth Proportional to 108.74, 149.92 and 90.32

Calculator

Solution

The fourth proportional to 108.74, 149.92 and 90.32 is: 124.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    108.74 : 149.92 = 90.32 : x
  2. Step 2: Convert to fraction form
    108.74/149.92 = 90.32/x
  3. Step 3: Cross multiply
    108.74x = 149.92 × 90.32
  4. Step 4: Simplify right side
    108.74x = 13,539.80
  5. Step 5: Solve for x
    x = 13,539.80/108.74
  6. Step 6: Final answer
    x = 124.51

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.