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Finding the Fourth Proportional to 317,776.38, 476,664.41 and 81,118.98

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Solution

The fourth proportional to 317,776.38, 476,664.41 and 81,118.98 is: 121,678.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,776.38 : 476,664.41 = 81,118.98 : x
  2. Step 2: Convert to fraction form
    317,776.38/476,664.41 = 81,118.98/x
  3. Step 3: Cross multiply
    317,776.38x = 476,664.41 × 81,118.98
  4. Step 4: Simplify right side
    317,776.38x = 38,666,530,944.30
  5. Step 5: Solve for x
    x = 38,666,530,944.30/317,776.38
  6. Step 6: Final answer
    x = 121,678.43

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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.