Home / 121,067.55-167,078.61-100,890.65

Finding the Fourth Proportional to 121,067.55, 167,078.61 and 100,890.65

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Solution

The fourth proportional to 121,067.55, 167,078.61 and 100,890.65 is: 139,233.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,067.55 : 167,078.61 = 100,890.65 : x
  2. Step 2: Convert to fraction form
    121,067.55/167,078.61 = 100,890.65/x
  3. Step 3: Cross multiply
    121,067.55x = 167,078.61 × 100,890.65
  4. Step 4: Simplify right side
    121,067.55x = 16,856,669,564.00
  5. Step 5: Solve for x
    x = 16,856,669,564.00/121,067.55
  6. Step 6: Final answer
    x = 139,233.59

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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.