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Finding the Fourth Proportional to 219,100.99, 328,687.80 and 76,909.37

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Solution

The fourth proportional to 219,100.99, 328,687.80 and 76,909.37 is: 115,376.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,100.99 : 328,687.80 = 76,909.37 : x
  2. Step 2: Convert to fraction form
    219,100.99/328,687.80 = 76,909.37/x
  3. Step 3: Cross multiply
    219,100.99x = 328,687.80 × 76,909.37
  4. Step 4: Simplify right side
    219,100.99x = 25,279,171,624.69
  5. Step 5: Solve for x
    x = 25,279,171,624.69/219,100.99
  6. Step 6: Final answer
    x = 115,376.80

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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.