Home / 81,192,464.20-121,788,696.30-20,608,190.20

Finding the Fourth Proportional to 81,192,464.20, 121,788,696.30 and 20,608,190.20

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Solution

The fourth proportional to 81,192,464.20, 121,788,696.30 and 20,608,190.20 is: 30,912,285.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,192,464.20 : 121,788,696.30 = 20,608,190.20 : x
  2. Step 2: Convert to fraction form
    81,192,464.20/121,788,696.30 = 20,608,190.20/x
  3. Step 3: Cross multiply
    81,192,464.20x = 121,788,696.30 × 20,608,190.20
  4. Step 4: Simplify right side
    81,192,464.20x = 2,509,844,617,560,436
  5. Step 5: Solve for x
    x = 2,509,844,617,560,436/81,192,464.20
  6. Step 6: Final answer
    x = 30,912,285.30

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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.