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Finding the Fourth Proportional to 71,693.26, 98,936.15 and 39,861.88

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Solution

The fourth proportional to 71,693.26, 98,936.15 and 39,861.88 is: 55,009.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.26 : 98,936.15 = 39,861.88 : x
  2. Step 2: Convert to fraction form
    71,693.26/98,936.15 = 39,861.88/x
  3. Step 3: Cross multiply
    71,693.26x = 98,936.15 × 39,861.88
  4. Step 4: Simplify right side
    71,693.26x = 3,943,780,938.96
  5. Step 5: Solve for x
    x = 3,943,780,938.96/71,693.26
  6. Step 6: Final answer
    x = 55,009.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.