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Finding the Fourth Proportional to 216,305.69, 324,459.27 and 66,544.97

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Solution

The fourth proportional to 216,305.69, 324,459.27 and 66,544.97 is: 99,817.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,305.69 : 324,459.27 = 66,544.97 : x
  2. Step 2: Convert to fraction form
    216,305.69/324,459.27 = 66,544.97/x
  3. Step 3: Cross multiply
    216,305.69x = 324,459.27 × 66,544.97
  4. Step 4: Simplify right side
    216,305.69x = 21,591,130,766.08
  5. Step 5: Solve for x
    x = 21,591,130,766.08/216,305.69
  6. Step 6: Final answer
    x = 99,817.68

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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.