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Finding the Fourth Proportional to 118,890, 164,068.20 and 68,589

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Solution

The fourth proportional to 118,890, 164,068.20 and 68,589 is: 94,652.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,890 : 164,068.20 = 68,589 : x
  2. Step 2: Convert to fraction form
    118,890/164,068.20 = 68,589/x
  3. Step 3: Cross multiply
    118,890x = 164,068.20 × 68,589
  4. Step 4: Simplify right side
    118,890x = 11,253,273,769.80
  5. Step 5: Solve for x
    x = 11,253,273,769.80/118,890
  6. Step 6: Final answer
    x = 94,652.82

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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.