Home / 173-238.78-138.08

Finding the Fourth Proportional to 173, 238.78 and 138.08

Calculator

Solution

The fourth proportional to 173, 238.78 and 138.08 is: 190.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    173 : 238.78 = 138.08 : x
  2. Step 2: Convert to fraction form
    173/238.78 = 138.08/x
  3. Step 3: Cross multiply
    173x = 238.78 × 138.08
  4. Step 4: Simplify right side
    173x = 32,970.74
  5. Step 5: Solve for x
    x = 32,970.74/173
  6. Step 6: Final answer
    x = 190.58

Related Problems

Find fourth proportional to 86.50, 119.39 and 69.04
Half scale
Find fourth proportional to 346, 477.56 and 276.16
Double scale
Find fourth proportional to 174, 240.16 and 139.08
Similar ratio
Find fourth proportional to 259.50, 358.17 and 207.12
1.5x scale

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.