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Finding the Fourth Proportional to 121,573.89, 167,771.55 and 67,858.43

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Solution

The fourth proportional to 121,573.89, 167,771.55 and 67,858.43 is: 93,644.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,573.89 : 167,771.55 = 67,858.43 : x
  2. Step 2: Convert to fraction form
    121,573.89/167,771.55 = 67,858.43/x
  3. Step 3: Cross multiply
    121,573.89x = 167,771.55 × 67,858.43
  4. Step 4: Simplify right side
    121,573.89x = 11,384,714,383.43
  5. Step 5: Solve for x
    x = 11,384,714,383.43/121,573.89
  6. Step 6: Final answer
    x = 93,644.41

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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.