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Finding the Fourth Proportional to 81,791,609.80, 122,583,216.30 and 43,471,481.80

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Solution

The fourth proportional to 81,791,609.80, 122,583,216.30 and 43,471,481.80 is: 65,151,842.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,791,609.80 : 122,583,216.30 = 43,471,481.80 : x
  2. Step 2: Convert to fraction form
    81,791,609.80/122,583,216.30 = 43,471,481.80/x
  3. Step 3: Cross multiply
    81,791,609.80x = 122,583,216.30 × 43,471,481.80
  4. Step 4: Simplify right side
    81,791,609.80x = 5,328,874,056,370,913
  5. Step 5: Solve for x
    x = 5,328,874,056,370,913/81,791,609.80
  6. Step 6: Final answer
    x = 65,151,842.22

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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.