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Finding the Fourth Proportional to 128,477.94, 192,606.17 and 49,647.48

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Solution

The fourth proportional to 128,477.94, 192,606.17 and 49,647.48 is: 74,428.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,477.94 : 192,606.17 = 49,647.48 : x
  2. Step 2: Convert to fraction form
    128,477.94/192,606.17 = 49,647.48/x
  3. Step 3: Cross multiply
    128,477.94x = 192,606.17 × 49,647.48
  4. Step 4: Simplify right side
    128,477.94x = 9,562,410,724.71
  5. Step 5: Solve for x
    x = 9,562,410,724.71/128,477.94
  6. Step 6: Final answer
    x = 74,428.43

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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.