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Finding the Fourth Proportional to 218,571.73, 327,828.88 and 68,812.80

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Solution

The fourth proportional to 218,571.73, 327,828.88 and 68,812.80 is: 103,210.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,571.73 : 327,828.88 = 68,812.80 : x
  2. Step 2: Convert to fraction form
    218,571.73/327,828.88 = 68,812.80/x
  3. Step 3: Cross multiply
    218,571.73x = 327,828.88 × 68,812.80
  4. Step 4: Simplify right side
    218,571.73x = 22,558,822,981.63
  5. Step 5: Solve for x
    x = 22,558,822,981.63/218,571.73
  6. Step 6: Final answer
    x = 103,210.16

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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.