Home / 121,619.14-167,790.09-71,308.42

Finding the Fourth Proportional to 121,619.14, 167,790.09 and 71,308.42

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Solution

The fourth proportional to 121,619.14, 167,790.09 and 71,308.42 is: 98,379.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,619.14 : 167,790.09 = 71,308.42 : x
  2. Step 2: Convert to fraction form
    121,619.14/167,790.09 = 71,308.42/x
  3. Step 3: Cross multiply
    121,619.14x = 167,790.09 × 71,308.42
  4. Step 4: Simplify right side
    121,619.14x = 11,964,846,209.56
  5. Step 5: Solve for x
    x = 11,964,846,209.56/121,619.14
  6. Step 6: Final answer
    x = 98,379.63

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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.