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Finding the Fourth Proportional to 121,263.54, 167,356.88 and 66,821.33

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Solution

The fourth proportional to 121,263.54, 167,356.88 and 66,821.33 is: 92,220.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,263.54 : 167,356.88 = 66,821.33 : x
  2. Step 2: Convert to fraction form
    121,263.54/167,356.88 = 66,821.33/x
  3. Step 3: Cross multiply
    121,263.54x = 167,356.88 × 66,821.33
  4. Step 4: Simplify right side
    121,263.54x = 11,183,008,135.36
  5. Step 5: Solve for x
    x = 11,183,008,135.36/121,263.54
  6. Step 6: Final answer
    x = 92,220.70

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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.