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Finding the Fourth Proportional to 121,716.40, 167,965.53 and 68,001.82

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Solution

The fourth proportional to 121,716.40, 167,965.53 and 68,001.82 is: 93,840.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,716.40 : 167,965.53 = 68,001.82 : x
  2. Step 2: Convert to fraction form
    121,716.40/167,965.53 = 68,001.82/x
  3. Step 3: Cross multiply
    121,716.40x = 167,965.53 × 68,001.82
  4. Step 4: Simplify right side
    121,716.40x = 11,421,960,897.44
  5. Step 5: Solve for x
    x = 11,421,960,897.44/121,716.40
  6. Step 6: Final answer
    x = 93,840.78

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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.