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Finding the Fourth Proportional to 191,989.40, 287,750.62 and 135,845.69

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Solution

The fourth proportional to 191,989.40, 287,750.62 and 135,845.69 is: 203,603.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,989.40 : 287,750.62 = 135,845.69 : x
  2. Step 2: Convert to fraction form
    191,989.40/287,750.62 = 135,845.69/x
  3. Step 3: Cross multiply
    191,989.40x = 287,750.62 × 135,845.69
  4. Step 4: Simplify right side
    191,989.40x = 39,089,680,083.07
  5. Step 5: Solve for x
    x = 39,089,680,083.07/191,989.40
  6. Step 6: Final answer
    x = 203,603.33

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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.