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Finding the Fourth Proportional to 218,782.97, 328,229.81 and 61,011.44

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Solution

The fourth proportional to 218,782.97, 328,229.81 and 61,011.44 is: 91,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,782.97 : 328,229.81 = 61,011.44 : x
  2. Step 2: Convert to fraction form
    218,782.97/328,229.81 = 61,011.44/x
  3. Step 3: Cross multiply
    218,782.97x = 328,229.81 × 61,011.44
  4. Step 4: Simplify right side
    218,782.97x = 20,025,772,872.47
  5. Step 5: Solve for x
    x = 20,025,772,872.47/218,782.97
  6. Step 6: Final answer
    x = 91,532.60

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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.