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Finding the Fourth Proportional to 219,099.99, 328,686.30 and 76,908.37

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Solution

The fourth proportional to 219,099.99, 328,686.30 and 76,908.37 is: 115,375.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,099.99 : 328,686.30 = 76,908.37 : x
  2. Step 2: Convert to fraction form
    219,099.99/328,686.30 = 76,908.37/x
  3. Step 3: Cross multiply
    219,099.99x = 328,686.30 × 76,908.37
  4. Step 4: Simplify right side
    219,099.99x = 25,278,725,930.90
  5. Step 5: Solve for x
    x = 25,278,725,930.90/219,099.99
  6. Step 6: Final answer
    x = 115,375.30

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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.