Home / 121,556.21-167,546.80-81,255.27

Finding the Fourth Proportional to 121,556.21, 167,546.80 and 81,255.27

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Solution

The fourth proportional to 121,556.21, 167,546.80 and 81,255.27 is: 111,998.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,556.21 : 167,546.80 = 81,255.27 : x
  2. Step 2: Convert to fraction form
    121,556.21/167,546.80 = 81,255.27/x
  3. Step 3: Cross multiply
    121,556.21x = 167,546.80 × 81,255.27
  4. Step 4: Simplify right side
    121,556.21x = 13,614,059,801.99
  5. Step 5: Solve for x
    x = 13,614,059,801.99/121,556.21
  6. Step 6: Final answer
    x = 111,998.06

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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.