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Finding the Fourth Proportional to 121,714.49, 167,969.42 and 68,005.42

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Solution

The fourth proportional to 121,714.49, 167,969.42 and 68,005.42 is: 93,849.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,714.49 : 167,969.42 = 68,005.42 : x
  2. Step 2: Convert to fraction form
    121,714.49/167,969.42 = 68,005.42/x
  3. Step 3: Cross multiply
    121,714.49x = 167,969.42 × 68,005.42
  4. Step 4: Simplify right side
    121,714.49x = 11,422,830,954.26
  5. Step 5: Solve for x
    x = 11,422,830,954.26/121,714.49
  6. Step 6: Final answer
    x = 93,849.39

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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.