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Finding the Fourth Proportional to 191,757.40, 287,420.10 and 91,965.40

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Solution

The fourth proportional to 191,757.40, 287,420.10 and 91,965.40 is: 137,844.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,757.40 : 287,420.10 = 91,965.40 : x
  2. Step 2: Convert to fraction form
    191,757.40/287,420.10 = 91,965.40/x
  3. Step 3: Cross multiply
    191,757.40x = 287,420.10 × 91,965.40
  4. Step 4: Simplify right side
    191,757.40x = 26,432,704,464.54
  5. Step 5: Solve for x
    x = 26,432,704,464.54/191,757.40
  6. Step 6: Final answer
    x = 137,844.51

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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.