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Finding the Fourth Proportional to 191,905.73, 287,735.42 and 79,663.42

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Solution

The fourth proportional to 191,905.73, 287,735.42 and 79,663.42 is: 119,444.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,905.73 : 287,735.42 = 79,663.42 : x
  2. Step 2: Convert to fraction form
    191,905.73/287,735.42 = 79,663.42/x
  3. Step 3: Cross multiply
    191,905.73x = 287,735.42 × 79,663.42
  4. Step 4: Simplify right side
    191,905.73x = 22,921,986,494.68
  5. Step 5: Solve for x
    x = 22,921,986,494.68/191,905.73
  6. Step 6: Final answer
    x = 119,444.00

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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.