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Finding the Fourth Proportional to 71,704.56, 98,954.98 and 39,875.70

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Solution

The fourth proportional to 71,704.56, 98,954.98 and 39,875.70 is: 55,029.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,704.56 : 98,954.98 = 39,875.70 : x
  2. Step 2: Convert to fraction form
    71,704.56/98,954.98 = 39,875.70/x
  3. Step 3: Cross multiply
    71,704.56x = 98,954.98 × 39,875.70
  4. Step 4: Simplify right side
    71,704.56x = 3,945,899,095.99
  5. Step 5: Solve for x
    x = 3,945,899,095.99/71,704.56
  6. Step 6: Final answer
    x = 55,029.96

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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.