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Finding the Fourth Proportional to 71,709.36, 98,951.34 and 39,873.12

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Solution

The fourth proportional to 71,709.36, 98,951.34 and 39,873.12 is: 55,020.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,709.36 : 98,951.34 = 39,873.12 : x
  2. Step 2: Convert to fraction form
    71,709.36/98,951.34 = 39,873.12/x
  3. Step 3: Cross multiply
    71,709.36x = 98,951.34 × 39,873.12
  4. Step 4: Simplify right side
    71,709.36x = 3,945,498,653.98
  5. Step 5: Solve for x
    x = 3,945,498,653.98/71,709.36
  6. Step 6: Final answer
    x = 55,020.69

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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.