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Finding the Fourth Proportional to 81,871,803.30, 122,807,704.95 and 43,608,051.30

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Solution

The fourth proportional to 81,871,803.30, 122,807,704.95 and 43,608,051.30 is: 65,412,076.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,871,803.30 : 122,807,704.95 = 43,608,051.30 : x
  2. Step 2: Convert to fraction form
    81,871,803.30/122,807,704.95 = 43,608,051.30/x
  3. Step 3: Cross multiply
    81,871,803.30x = 122,807,704.95 × 43,608,051.30
  4. Step 4: Simplify right side
    81,871,803.30x = 5,355,404,697,494,864
  5. Step 5: Solve for x
    x = 5,355,404,697,494,864/81,871,803.30
  6. Step 6: Final answer
    x = 65,412,076.95

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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.