Home / 87.28-130.68-65.84

Finding the Fourth Proportional to 87.28, 130.68 and 65.84

Calculator

Solution

The fourth proportional to 87.28, 130.68 and 65.84 is: 98.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.28 : 130.68 = 65.84 : x
  2. Step 2: Convert to fraction form
    87.28/130.68 = 65.84/x
  3. Step 3: Cross multiply
    87.28x = 130.68 × 65.84
  4. Step 4: Simplify right side
    87.28x = 8,603.97
  5. Step 5: Solve for x
    x = 8,603.97/87.28
  6. Step 6: Final answer
    x = 98.58

Related Problems

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.