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Finding the Fourth Proportional to 73,871,999.80, 110,807,999.70 and 20,019,311.80

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Solution

The fourth proportional to 73,871,999.80, 110,807,999.70 and 20,019,311.80 is: 30,028,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,871,999.80 : 110,807,999.70 = 20,019,311.80 : x
  2. Step 2: Convert to fraction form
    73,871,999.80/110,807,999.70 = 20,019,311.80/x
  3. Step 3: Cross multiply
    73,871,999.80x = 110,807,999.70 × 20,019,311.80
  4. Step 4: Simplify right side
    73,871,999.80x = 2,218,299,895,928,606.50
  5. Step 5: Solve for x
    x = 2,218,299,895,928,606.50/73,871,999.80
  6. Step 6: Final answer
    x = 30,028,967.70

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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.