Home / 65.25-90.05-36.15

Finding the Fourth Proportional to 65.25, 90.05 and 36.15

Calculator

Solution

The fourth proportional to 65.25, 90.05 and 36.15 is: 49.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.25 : 90.05 = 36.15 : x
  2. Step 2: Convert to fraction form
    65.25/90.05 = 36.15/x
  3. Step 3: Cross multiply
    65.25x = 90.05 × 36.15
  4. Step 4: Simplify right side
    65.25x = 3,254.79
  5. Step 5: Solve for x
    x = 3,254.79/65.25
  6. Step 6: Final answer
    x = 49.88

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.