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Finding the Fourth Proportional to 121,576.44, 167,783.94 and 67,872

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Solution

The fourth proportional to 121,576.44, 167,783.94 and 67,872 is: 93,668.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,576.44 : 167,783.94 = 67,872 : x
  2. Step 2: Convert to fraction form
    121,576.44/167,783.94 = 67,872/x
  3. Step 3: Cross multiply
    121,576.44x = 167,783.94 × 67,872
  4. Step 4: Simplify right side
    121,576.44x = 11,387,831,575.68
  5. Step 5: Solve for x
    x = 11,387,831,575.68/121,576.44
  6. Step 6: Final answer
    x = 93,668.08

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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.