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Finding the Fourth Proportional to 276,790.86, 415,186.68 and 77,111.82

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Solution

The fourth proportional to 276,790.86, 415,186.68 and 77,111.82 is: 115,667.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,790.86 : 415,186.68 = 77,111.82 : x
  2. Step 2: Convert to fraction form
    276,790.86/415,186.68 = 77,111.82/x
  3. Step 3: Cross multiply
    276,790.86x = 415,186.68 × 77,111.82
  4. Step 4: Simplify right side
    276,790.86x = 32,015,800,534.56
  5. Step 5: Solve for x
    x = 32,015,800,534.56/276,790.86
  6. Step 6: Final answer
    x = 115,667.84

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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.