Home / 121,399.44-181,987-76,891.60

Finding the Fourth Proportional to 121,399.44, 181,987 and 76,891.60

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Solution

The fourth proportional to 121,399.44, 181,987 and 76,891.60 is: 115,266.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,399.44 : 181,987 = 76,891.60 : x
  2. Step 2: Convert to fraction form
    121,399.44/181,987 = 76,891.60/x
  3. Step 3: Cross multiply
    121,399.44x = 181,987 × 76,891.60
  4. Step 4: Simplify right side
    121,399.44x = 13,993,271,609.20
  5. Step 5: Solve for x
    x = 13,993,271,609.20/121,399.44
  6. Step 6: Final answer
    x = 115,266.36

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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.