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Finding the Fourth Proportional to 81,893.72, 122,594.53 and 73,338.90

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Solution

The fourth proportional to 81,893.72, 122,594.53 and 73,338.90 is: 109,788.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,893.72 : 122,594.53 = 73,338.90 : x
  2. Step 2: Convert to fraction form
    81,893.72/122,594.53 = 73,338.90/x
  3. Step 3: Cross multiply
    81,893.72x = 122,594.53 × 73,338.90
  4. Step 4: Simplify right side
    81,893.72x = 8,990,947,976.22
  5. Step 5: Solve for x
    x = 8,990,947,976.22/81,893.72
  6. Step 6: Final answer
    x = 109,788.00

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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.