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Finding the Fourth Proportional to 216,611.78, 324,798.72 and 66,810.50

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Solution

The fourth proportional to 216,611.78, 324,798.72 and 66,810.50 is: 100,179.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,611.78 : 324,798.72 = 66,810.50 : x
  2. Step 2: Convert to fraction form
    216,611.78/324,798.72 = 66,810.50/x
  3. Step 3: Cross multiply
    216,611.78x = 324,798.72 × 66,810.50
  4. Step 4: Simplify right side
    216,611.78x = 21,699,964,882.56
  5. Step 5: Solve for x
    x = 21,699,964,882.56/216,611.78
  6. Step 6: Final answer
    x = 100,179.06

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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.