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Finding the Fourth Proportional to 78,604.60, 117,906.90 and 73,996.60

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Solution

The fourth proportional to 78,604.60, 117,906.90 and 73,996.60 is: 110,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,604.60 : 117,906.90 = 73,996.60 : x
  2. Step 2: Convert to fraction form
    78,604.60/117,906.90 = 73,996.60/x
  3. Step 3: Cross multiply
    78,604.60x = 117,906.90 × 73,996.60
  4. Step 4: Simplify right side
    78,604.60x = 8,724,709,716.54
  5. Step 5: Solve for x
    x = 8,724,709,716.54/78,604.60
  6. Step 6: Final answer
    x = 110,994.90

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1.5x scale

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.