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Finding the Fourth Proportional to 121,076.56, 167,091.04 and 100,899.68

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Solution

The fourth proportional to 121,076.56, 167,091.04 and 100,899.68 is: 139,246.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,076.56 : 167,091.04 = 100,899.68 : x
  2. Step 2: Convert to fraction form
    121,076.56/167,091.04 = 100,899.68/x
  3. Step 3: Cross multiply
    121,076.56x = 167,091.04 × 100,899.68
  4. Step 4: Simplify right side
    121,076.56x = 16,859,432,466.87
  5. Step 5: Solve for x
    x = 16,859,432,466.87/121,076.56
  6. Step 6: Final answer
    x = 139,246.05

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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.