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Finding the Fourth Proportional to 81,656,692.80, 122,485,039.20 and 27,804,004.80

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Solution

The fourth proportional to 81,656,692.80, 122,485,039.20 and 27,804,004.80 is: 41,706,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,656,692.80 : 122,485,039.20 = 27,804,004.80 : x
  2. Step 2: Convert to fraction form
    81,656,692.80/122,485,039.20 = 27,804,004.80/x
  3. Step 3: Cross multiply
    81,656,692.80x = 122,485,039.20 × 27,804,004.80
  4. Step 4: Simplify right side
    81,656,692.80x = 3,405,574,617,844,988.50
  5. Step 5: Solve for x
    x = 3,405,574,617,844,988.50/81,656,692.80
  6. Step 6: Final answer
    x = 41,706,007.20

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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.