Home / 81,394,728.40-122,092,092.60-20,807,246.80

Finding the Fourth Proportional to 81,394,728.40, 122,092,092.60 and 20,807,246.80

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Solution

The fourth proportional to 81,394,728.40, 122,092,092.60 and 20,807,246.80 is: 31,210,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,394,728.40 : 122,092,092.60 = 20,807,246.80 : x
  2. Step 2: Convert to fraction form
    81,394,728.40/122,092,092.60 = 20,807,246.80/x
  3. Step 3: Cross multiply
    81,394,728.40x = 122,092,092.60 × 20,807,246.80
  4. Step 4: Simplify right side
    81,394,728.40x = 2,540,400,303,056,653.50
  5. Step 5: Solve for x
    x = 2,540,400,303,056,653.50/81,394,728.40
  6. Step 6: Final answer
    x = 31,210,870.20

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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.