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Finding the Fourth Proportional to 66,109.25, 99,163.88 and 16,861.25

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Solution

The fourth proportional to 66,109.25, 99,163.88 and 16,861.25 is: 25,291.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,109.25 : 99,163.88 = 16,861.25 : x
  2. Step 2: Convert to fraction form
    66,109.25/99,163.88 = 16,861.25/x
  3. Step 3: Cross multiply
    66,109.25x = 99,163.88 × 16,861.25
  4. Step 4: Simplify right side
    66,109.25x = 1,672,026,971.65
  5. Step 5: Solve for x
    x = 1,672,026,971.65/66,109.25
  6. Step 6: Final answer
    x = 25,291.88

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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.