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Finding the Fourth Proportional to 218,819.11, 328,284.02 and 61,047.49

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Solution

The fourth proportional to 218,819.11, 328,284.02 and 61,047.49 is: 91,586.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,819.11 : 328,284.02 = 61,047.49 : x
  2. Step 2: Convert to fraction form
    218,819.11/328,284.02 = 61,047.49/x
  3. Step 3: Cross multiply
    218,819.11x = 328,284.02 × 61,047.49
  4. Step 4: Simplify right side
    218,819.11x = 20,040,915,122.87
  5. Step 5: Solve for x
    x = 20,040,915,122.87/218,819.11
  6. Step 6: Final answer
    x = 91,586.68

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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.