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Finding the Fourth Proportional to 28,188,201.20, 42,282,301.80 and 9,019,583.60

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Solution

The fourth proportional to 28,188,201.20, 42,282,301.80 and 9,019,583.60 is: 13,529,375.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188,201.20 : 42,282,301.80 = 9,019,583.60 : x
  2. Step 2: Convert to fraction form
    28,188,201.20/42,282,301.80 = 9,019,583.60/x
  3. Step 3: Cross multiply
    28,188,201.20x = 42,282,301.80 × 9,019,583.60
  4. Step 4: Simplify right side
    28,188,201.20x = 381,368,755,885,530.44
  5. Step 5: Solve for x
    x = 381,368,755,885,530.44/28,188,201.20
  6. Step 6: Final answer
    x = 13,529,375.40

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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.