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Finding the Fourth Proportional to 81,776,520.80, 122,560,582.80 and 43,456,392.80

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Solution

The fourth proportional to 81,776,520.80, 122,560,582.80 and 43,456,392.80 is: 65,129,217.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,776,520.80 : 122,560,582.80 = 43,456,392.80 : x
  2. Step 2: Convert to fraction form
    81,776,520.80/122,560,582.80 = 43,456,392.80/x
  3. Step 3: Cross multiply
    81,776,520.80x = 122,560,582.80 × 43,456,392.80
  4. Step 4: Simplify right side
    81,776,520.80x = 5,326,040,827,953,723
  5. Step 5: Solve for x
    x = 5,326,040,827,953,723/81,776,520.80
  6. Step 6: Final answer
    x = 65,129,217.72

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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.