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Finding the Fourth Proportional to 219,035.20, 328,552.80 and 71,291.20

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Solution

The fourth proportional to 219,035.20, 328,552.80 and 71,291.20 is: 106,936.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,035.20 : 328,552.80 = 71,291.20 : x
  2. Step 2: Convert to fraction form
    219,035.20/328,552.80 = 71,291.20/x
  3. Step 3: Cross multiply
    219,035.20x = 328,552.80 × 71,291.20
  4. Step 4: Simplify right side
    219,035.20x = 23,422,923,375.36
  5. Step 5: Solve for x
    x = 23,422,923,375.36/219,035.20
  6. Step 6: Final answer
    x = 106,936.80

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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.