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Finding the Fourth Proportional to 71,783,999.70, 107,675,999.55 and 28,659,858.90

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Solution

The fourth proportional to 71,783,999.70, 107,675,999.55 and 28,659,858.90 is: 42,989,788.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,783,999.70 : 107,675,999.55 = 28,659,858.90 : x
  2. Step 2: Convert to fraction form
    71,783,999.70/107,675,999.55 = 28,659,858.90/x
  3. Step 3: Cross multiply
    71,783,999.70x = 107,675,999.55 × 28,659,858.90
  4. Step 4: Simplify right side
    71,783,999.70x = 3,085,978,954,019,463
  5. Step 5: Solve for x
    x = 3,085,978,954,019,463/71,783,999.70
  6. Step 6: Final answer
    x = 42,989,788.35

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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.