Home / 64.47-88.92-57.11

Finding the Fourth Proportional to 64.47, 88.92 and 57.11

Calculator

Solution

The fourth proportional to 64.47, 88.92 and 57.11 is: 78.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.47 : 88.92 = 57.11 : x
  2. Step 2: Convert to fraction form
    64.47/88.92 = 57.11/x
  3. Step 3: Cross multiply
    64.47x = 88.92 × 57.11
  4. Step 4: Simplify right side
    64.47x = 5,077.78
  5. Step 5: Solve for x
    x = 5,077.78/64.47
  6. Step 6: Final answer
    x = 78.76

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.