Home / 87-130.38-74.16

Finding the Fourth Proportional to 87, 130.38 and 74.16

Calculator

Solution

The fourth proportional to 87, 130.38 and 74.16 is: 111.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    87 : 130.38 = 74.16 : x
  2. Step 2: Convert to fraction form
    87/130.38 = 74.16/x
  3. Step 3: Cross multiply
    87x = 130.38 × 74.16
  4. Step 4: Simplify right side
    87x = 9,668.98
  5. Step 5: Solve for x
    x = 9,668.98/87
  6. Step 6: Final answer
    x = 111.14

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.