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Finding the Fourth Proportional to 71,694.30, 98,937.81 and 39,861.30

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Solution

The fourth proportional to 71,694.30, 98,937.81 and 39,861.30 is: 55,008.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,694.30 : 98,937.81 = 39,861.30 : x
  2. Step 2: Convert to fraction form
    71,694.30/98,937.81 = 39,861.30/x
  3. Step 3: Cross multiply
    71,694.30x = 98,937.81 × 39,861.30
  4. Step 4: Simplify right side
    71,694.30x = 3,943,789,725.75
  5. Step 5: Solve for x
    x = 3,943,789,725.75/71,694.30
  6. Step 6: Final answer
    x = 55,008.41

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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.