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Finding the Fourth Proportional to 191,994.60, 287,991.90 and 145,338.60

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Solution

The fourth proportional to 191,994.60, 287,991.90 and 145,338.60 is: 218,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,994.60 : 287,991.90 = 145,338.60 : x
  2. Step 2: Convert to fraction form
    191,994.60/287,991.90 = 145,338.60/x
  3. Step 3: Cross multiply
    191,994.60x = 287,991.90 × 145,338.60
  4. Step 4: Simplify right side
    191,994.60x = 41,856,339,557.34
  5. Step 5: Solve for x
    x = 41,856,339,557.34/191,994.60
  6. Step 6: Final answer
    x = 218,007.90

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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.