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Finding the Fourth Proportional to 80,893.78, 121,351.60 and 75,973.03

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Solution

The fourth proportional to 80,893.78, 121,351.60 and 75,973.03 is: 113,969.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,893.78 : 121,351.60 = 75,973.03 : x
  2. Step 2: Convert to fraction form
    80,893.78/121,351.60 = 75,973.03/x
  3. Step 3: Cross multiply
    80,893.78x = 121,351.60 × 75,973.03
  4. Step 4: Simplify right side
    80,893.78x = 9,219,448,538.94
  5. Step 5: Solve for x
    x = 9,219,448,538.94/80,893.78
  6. Step 6: Final answer
    x = 113,969.81

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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.