Home / 81,394,554.40-122,091,831.60-20,807,072.80

Finding the Fourth Proportional to 81,394,554.40, 122,091,831.60 and 20,807,072.80

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Solution

The fourth proportional to 81,394,554.40, 122,091,831.60 and 20,807,072.80 is: 31,210,609.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,394,554.40 : 122,091,831.60 = 20,807,072.80 : x
  2. Step 2: Convert to fraction form
    81,394,554.40/122,091,831.60 = 20,807,072.80/x
  3. Step 3: Cross multiply
    81,394,554.40x = 122,091,831.60 × 20,807,072.80
  4. Step 4: Simplify right side
    81,394,554.40x = 2,540,373,628,386,540.50
  5. Step 5: Solve for x
    x = 2,540,373,628,386,540.50/81,394,554.40
  6. Step 6: Final answer
    x = 31,210,609.20

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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.