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Finding the Fourth Proportional to 121,747.82, 168,008.75 and 68,033.28

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Solution

The fourth proportional to 121,747.82, 168,008.75 and 68,033.28 is: 93,884.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,747.82 : 168,008.75 = 68,033.28 : x
  2. Step 2: Convert to fraction form
    121,747.82/168,008.75 = 68,033.28/x
  3. Step 3: Cross multiply
    121,747.82x = 168,008.75 × 68,033.28
  4. Step 4: Simplify right side
    121,747.82x = 11,430,185,991.03
  5. Step 5: Solve for x
    x = 11,430,185,991.03/121,747.82
  6. Step 6: Final answer
    x = 93,884.11

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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.