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Finding the Fourth Proportional to 218,850.82, 328,153.11 and 69,063.20

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Solution

The fourth proportional to 218,850.82, 328,153.11 and 69,063.20 is: 103,555.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,850.82 : 328,153.11 = 69,063.20 : x
  2. Step 2: Convert to fraction form
    218,850.82/328,153.11 = 69,063.20/x
  3. Step 3: Cross multiply
    218,850.82x = 328,153.11 × 69,063.20
  4. Step 4: Simplify right side
    218,850.82x = 22,663,303,866.55
  5. Step 5: Solve for x
    x = 22,663,303,866.55/218,850.82
  6. Step 6: Final answer
    x = 103,555.95

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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.