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Finding the Fourth Proportional to 118,889.67, 164,040.80 and 80,654.43

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Solution

The fourth proportional to 118,889.67, 164,040.80 and 80,654.43 is: 111,284.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,889.67 : 164,040.80 = 80,654.43 : x
  2. Step 2: Convert to fraction form
    118,889.67/164,040.80 = 80,654.43/x
  3. Step 3: Cross multiply
    118,889.67x = 164,040.80 × 80,654.43
  4. Step 4: Simplify right side
    118,889.67x = 13,230,616,817.47
  5. Step 5: Solve for x
    x = 13,230,616,817.47/118,889.67
  6. Step 6: Final answer
    x = 111,284.83

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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.