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Finding the Fourth Proportional to 191,697.87, 287,674.79 and 67,038.87

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Solution

The fourth proportional to 191,697.87, 287,674.79 and 67,038.87 is: 100,603.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,697.87 : 287,674.79 = 67,038.87 : x
  2. Step 2: Convert to fraction form
    191,697.87/287,674.79 = 67,038.87/x
  3. Step 3: Cross multiply
    191,697.87x = 287,674.79 × 67,038.87
  4. Step 4: Simplify right side
    191,697.87x = 19,285,392,513.89
  5. Step 5: Solve for x
    x = 19,285,392,513.89/191,697.87
  6. Step 6: Final answer
    x = 100,603.06

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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.