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Finding the Fourth Proportional to 219,039.88, 328,509.60 and 61,284.28

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Solution

The fourth proportional to 219,039.88, 328,509.60 and 61,284.28 is: 91,912.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,039.88 : 328,509.60 = 61,284.28 : x
  2. Step 2: Convert to fraction form
    219,039.88/328,509.60 = 61,284.28/x
  3. Step 3: Cross multiply
    219,039.88x = 328,509.60 × 61,284.28
  4. Step 4: Simplify right side
    219,039.88x = 20,132,474,309.09
  5. Step 5: Solve for x
    x = 20,132,474,309.09/219,039.88
  6. Step 6: Final answer
    x = 91,912.37

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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.