Home / 65.25-90.12-48.09

Finding the Fourth Proportional to 65.25, 90.12 and 48.09

Calculator

Solution

The fourth proportional to 65.25, 90.12 and 48.09 is: 66.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.25 : 90.12 = 48.09 : x
  2. Step 2: Convert to fraction form
    65.25/90.12 = 48.09/x
  3. Step 3: Cross multiply
    65.25x = 90.12 × 48.09
  4. Step 4: Simplify right side
    65.25x = 4,333.87
  5. Step 5: Solve for x
    x = 4,333.87/65.25
  6. Step 6: Final answer
    x = 66.42

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.