Home / 130,978-196,467-47,872

Finding the Fourth Proportional to 130,978, 196,467 and 47,872

Calculator

Solution

The fourth proportional to 130,978, 196,467 and 47,872 is: 71,808

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,978 : 196,467 = 47,872 : x
  2. Step 2: Convert to fraction form
    130,978/196,467 = 47,872/x
  3. Step 3: Cross multiply
    130,978x = 196,467 × 47,872
  4. Step 4: Simplify right side
    130,978x = 9,405,268,224
  5. Step 5: Solve for x
    x = 9,405,268,224/130,978
  6. Step 6: Final answer
    x = 71,808

Related Problems

Find fourth proportional to 65,489, 98,233.50 and 23,936
Half scale
Find fourth proportional to 261,956, 392,934 and 95,744
Double scale
Find fourth proportional to 130,979, 196,468.50 and 47,873
Similar ratio
Find fourth proportional to 196,467, 294,700.50 and 71,808
1.5x scale

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.