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Finding the Fourth Proportional to 121,718.71, 167,968.72 and 68,004.13

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Solution

The fourth proportional to 121,718.71, 167,968.72 and 68,004.13 is: 93,843.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,718.71 : 167,968.72 = 68,004.13 : x
  2. Step 2: Convert to fraction form
    121,718.71/167,968.72 = 68,004.13/x
  3. Step 3: Cross multiply
    121,718.71x = 167,968.72 × 68,004.13
  4. Step 4: Simplify right side
    121,718.71x = 11,422,566,650.84
  5. Step 5: Solve for x
    x = 11,422,566,650.84/121,718.71
  6. Step 6: Final answer
    x = 93,843.97

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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.