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Finding the Fourth Proportional to 78,339.99, 108,029.79 and 67,046.97

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Solution

The fourth proportional to 78,339.99, 108,029.79 and 67,046.97 is: 92,456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.99 : 108,029.79 = 67,046.97 : x
  2. Step 2: Convert to fraction form
    78,339.99/108,029.79 = 67,046.97/x
  3. Step 3: Cross multiply
    78,339.99x = 108,029.79 × 67,046.97
  4. Step 4: Simplify right side
    78,339.99x = 7,243,070,089.24
  5. Step 5: Solve for x
    x = 7,243,070,089.24/78,339.99
  6. Step 6: Final answer
    x = 92,456.87

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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.