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Finding the Fourth Proportional to 81,843.90, 122,650.65 and 60,618.30

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Solution

The fourth proportional to 81,843.90, 122,650.65 and 60,618.30 is: 90,842.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,843.90 : 122,650.65 = 60,618.30 : x
  2. Step 2: Convert to fraction form
    81,843.90/122,650.65 = 60,618.30/x
  3. Step 3: Cross multiply
    81,843.90x = 122,650.65 × 60,618.30
  4. Step 4: Simplify right side
    81,843.90x = 7,434,873,896.90
  5. Step 5: Solve for x
    x = 7,434,873,896.90/81,843.90
  6. Step 6: Final answer
    x = 90,842.13

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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.