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Finding the Fourth Proportional to 81,097.92, 121,668.81 and 73,290.33

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Solution

The fourth proportional to 81,097.92, 121,668.81 and 73,290.33 is: 109,955.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,097.92 : 121,668.81 = 73,290.33 : x
  2. Step 2: Convert to fraction form
    81,097.92/121,668.81 = 73,290.33/x
  3. Step 3: Cross multiply
    81,097.92x = 121,668.81 × 73,290.33
  4. Step 4: Simplify right side
    81,097.92x = 8,917,147,235.61
  5. Step 5: Solve for x
    x = 8,917,147,235.61/81,097.92
  6. Step 6: Final answer
    x = 109,955.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.