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Finding the Fourth Proportional to 121,731.26, 167,978.21 and 68,008.82

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Solution

The fourth proportional to 121,731.26, 167,978.21 and 68,008.82 is: 93,846.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,731.26 : 167,978.21 = 68,008.82 : x
  2. Step 2: Convert to fraction form
    121,731.26/167,978.21 = 68,008.82/x
  3. Step 3: Cross multiply
    121,731.26x = 167,978.21 × 68,008.82
  4. Step 4: Simplify right side
    121,731.26x = 11,423,998,667.88
  5. Step 5: Solve for x
    x = 11,423,998,667.88/121,731.26
  6. Step 6: Final answer
    x = 93,846.06

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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.