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Finding the Fourth Proportional to 78,209.99, 107,929.09 and 43,754.35

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Solution

The fourth proportional to 78,209.99, 107,929.09 and 43,754.35 is: 60,380.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,209.99 : 107,929.09 = 43,754.35 : x
  2. Step 2: Convert to fraction form
    78,209.99/107,929.09 = 43,754.35/x
  3. Step 3: Cross multiply
    78,209.99x = 107,929.09 × 43,754.35
  4. Step 4: Simplify right side
    78,209.99x = 4,722,367,179.04
  5. Step 5: Solve for x
    x = 4,722,367,179.04/78,209.99
  6. Step 6: Final answer
    x = 60,380.61

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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.