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Finding the Fourth Proportional to 75,963.94, 104,859.30 and 67,991.92

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Solution

The fourth proportional to 75,963.94, 104,859.30 and 67,991.92 is: 93,854.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,963.94 : 104,859.30 = 67,991.92 : x
  2. Step 2: Convert to fraction form
    75,963.94/104,859.30 = 67,991.92/x
  3. Step 3: Cross multiply
    75,963.94x = 104,859.30 × 67,991.92
  4. Step 4: Simplify right side
    75,963.94x = 7,129,585,136.86
  5. Step 5: Solve for x
    x = 7,129,585,136.86/75,963.94
  6. Step 6: Final answer
    x = 93,854.86

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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.