Home / 165.09-247.43-78.47

Finding the Fourth Proportional to 165.09, 247.43 and 78.47

Calculator

Solution

The fourth proportional to 165.09, 247.43 and 78.47 is: 117.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.09 : 247.43 = 78.47 : x
  2. Step 2: Convert to fraction form
    165.09/247.43 = 78.47/x
  3. Step 3: Cross multiply
    165.09x = 247.43 × 78.47
  4. Step 4: Simplify right side
    165.09x = 19,415.50
  5. Step 5: Solve for x
    x = 19,415.50/165.09
  6. Step 6: Final answer
    x = 117.61

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.