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Finding the Fourth Proportional to 81,808.43, 122,587.41 and 55,055.44

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Solution

The fourth proportional to 81,808.43, 122,587.41 and 55,055.44 is: 82,498.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,808.43 : 122,587.41 = 55,055.44 : x
  2. Step 2: Convert to fraction form
    81,808.43/122,587.41 = 55,055.44/x
  3. Step 3: Cross multiply
    81,808.43x = 122,587.41 × 55,055.44
  4. Step 4: Simplify right side
    81,808.43x = 6,749,104,345.64
  5. Step 5: Solve for x
    x = 6,749,104,345.64/81,808.43
  6. Step 6: Final answer
    x = 82,498.88

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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.