Home / 60.90-90.72-58.15

Finding the Fourth Proportional to 60.90, 90.72 and 58.15

Calculator

Solution

The fourth proportional to 60.90, 90.72 and 58.15 is: 86.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.90 : 90.72 = 58.15 : x
  2. Step 2: Convert to fraction form
    60.90/90.72 = 58.15/x
  3. Step 3: Cross multiply
    60.90x = 90.72 × 58.15
  4. Step 4: Simplify right side
    60.90x = 5,275.37
  5. Step 5: Solve for x
    x = 5,275.37/60.90
  6. Step 6: Final answer
    x = 86.62

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.