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Finding the Fourth Proportional to 71,965.94, 99,390.44 and 54,786.92

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Solution

The fourth proportional to 71,965.94, 99,390.44 and 54,786.92 is: 75,664.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,965.94 : 99,390.44 = 54,786.92 : x
  2. Step 2: Convert to fraction form
    71,965.94/99,390.44 = 54,786.92/x
  3. Step 3: Cross multiply
    71,965.94x = 99,390.44 × 54,786.92
  4. Step 4: Simplify right side
    71,965.94x = 5,445,295,725.06
  5. Step 5: Solve for x
    x = 5,445,295,725.06/71,965.94
  6. Step 6: Final answer
    x = 75,664.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.