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Finding the Fourth Proportional to 189,912.11, 284,780.34 and 69,938.77

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Solution

The fourth proportional to 189,912.11, 284,780.34 and 69,938.77 is: 104,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,912.11 : 284,780.34 = 69,938.77 : x
  2. Step 2: Convert to fraction form
    189,912.11/284,780.34 = 69,938.77/x
  3. Step 3: Cross multiply
    189,912.11x = 284,780.34 × 69,938.77
  4. Step 4: Simplify right side
    189,912.11x = 19,917,186,699.78
  5. Step 5: Solve for x
    x = 19,917,186,699.78/189,912.11
  6. Step 6: Final answer
    x = 104,875.81

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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.