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Finding the Fourth Proportional to 216,379.56, 324,611.16 and 66,593.28

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Solution

The fourth proportional to 216,379.56, 324,611.16 and 66,593.28 is: 99,902.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,379.56 : 324,611.16 = 66,593.28 : x
  2. Step 2: Convert to fraction form
    216,379.56/324,611.16 = 66,593.28/x
  3. Step 3: Cross multiply
    216,379.56x = 324,611.16 × 66,593.28
  4. Step 4: Simplify right side
    216,379.56x = 21,616,921,869.00
  5. Step 5: Solve for x
    x = 21,616,921,869.00/216,379.56
  6. Step 6: Final answer
    x = 99,902.79

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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.