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Finding the Fourth Proportional to 128,065.64, 192,107.75 and 49,179.87

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Solution

The fourth proportional to 128,065.64, 192,107.75 and 49,179.87 is: 73,773.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,065.64 : 192,107.75 = 49,179.87 : x
  2. Step 2: Convert to fraction form
    128,065.64/192,107.75 = 49,179.87/x
  3. Step 3: Cross multiply
    128,065.64x = 192,107.75 × 49,179.87
  4. Step 4: Simplify right side
    128,065.64x = 9,447,834,471.88
  5. Step 5: Solve for x
    x = 9,447,834,471.88/128,065.64
  6. Step 6: Final answer
    x = 73,773.37

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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.