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Finding the Fourth Proportional to 81,776,521.80, 122,560,584.30 and 43,456,393.80

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Solution

The fourth proportional to 81,776,521.80, 122,560,584.30 and 43,456,393.80 is: 65,129,219.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,776,521.80 : 122,560,584.30 = 43,456,393.80 : x
  2. Step 2: Convert to fraction form
    81,776,521.80/122,560,584.30 = 43,456,393.80/x
  3. Step 3: Cross multiply
    81,776,521.80x = 122,560,584.30 × 43,456,393.80
  4. Step 4: Simplify right side
    81,776,521.80x = 5,326,041,015,698,897
  5. Step 5: Solve for x
    x = 5,326,041,015,698,897/81,776,521.80
  6. Step 6: Final answer
    x = 65,129,219.22

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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.