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Finding the Fourth Proportional to 121,065.97, 167,076.42 and 100,889.05

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Solution

The fourth proportional to 121,065.97, 167,076.42 and 100,889.05 is: 139,231.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,065.97 : 167,076.42 = 100,889.05 : x
  2. Step 2: Convert to fraction form
    121,065.97/167,076.42 = 100,889.05/x
  3. Step 3: Cross multiply
    121,065.97x = 167,076.42 × 100,889.05
  4. Step 4: Simplify right side
    121,065.97x = 16,856,181,291.20
  5. Step 5: Solve for x
    x = 16,856,181,291.20/121,065.97
  6. Step 6: Final answer
    x = 139,231.37

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1.5x scale

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.