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Finding the Fourth Proportional to 121,718.90, 167,968.98 and 68,004.32

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Solution

The fourth proportional to 121,718.90, 167,968.98 and 68,004.32 is: 93,844.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,718.90 : 167,968.98 = 68,004.32 : x
  2. Step 2: Convert to fraction form
    121,718.90/167,968.98 = 68,004.32/x
  3. Step 3: Cross multiply
    121,718.90x = 167,968.98 × 68,004.32
  4. Step 4: Simplify right side
    121,718.90x = 11,422,616,265.99
  5. Step 5: Solve for x
    x = 11,422,616,265.99/121,718.90
  6. Step 6: Final answer
    x = 93,844.23

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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.