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Finding the Fourth Proportional to 80,639,038.80, 120,958,995.60 and 20,054,764.80

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Solution

The fourth proportional to 80,639,038.80, 120,958,995.60 and 20,054,764.80 is: 30,082,255.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,639,038.80 : 120,958,995.60 = 20,054,764.80 : x
  2. Step 2: Convert to fraction form
    80,639,038.80/120,958,995.60 = 20,054,764.80/x
  3. Step 3: Cross multiply
    80,639,038.80x = 120,958,995.60 × 20,054,764.80
  4. Step 4: Simplify right side
    80,639,038.80x = 2,425,804,207,202,235
  5. Step 5: Solve for x
    x = 2,425,804,207,202,235/80,639,038.80
  6. Step 6: Final answer
    x = 30,082,255.98

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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.