Home / 121,218.42-167,195.25-80,911.86

Finding the Fourth Proportional to 121,218.42, 167,195.25 and 80,911.86

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Solution

The fourth proportional to 121,218.42, 167,195.25 and 80,911.86 is: 111,600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,218.42 : 167,195.25 = 80,911.86 : x
  2. Step 2: Convert to fraction form
    121,218.42/167,195.25 = 80,911.86/x
  3. Step 3: Cross multiply
    121,218.42x = 167,195.25 × 80,911.86
  4. Step 4: Simplify right side
    121,218.42x = 13,528,078,660.67
  5. Step 5: Solve for x
    x = 13,528,078,660.67/121,218.42
  6. Step 6: Final answer
    x = 111,600.85

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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.