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Finding the Fourth Proportional to 71,671.50, 98,901.99 and 39,839.22

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Solution

The fourth proportional to 71,671.50, 98,901.99 and 39,839.22 is: 54,975.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.50 : 98,901.99 = 39,839.22 : x
  2. Step 2: Convert to fraction form
    71,671.50/98,901.99 = 39,839.22/x
  3. Step 3: Cross multiply
    71,671.50x = 98,901.99 × 39,839.22
  4. Step 4: Simplify right side
    71,671.50x = 3,940,178,138.05
  5. Step 5: Solve for x
    x = 3,940,178,138.05/71,671.50
  6. Step 6: Final answer
    x = 54,975.52

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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.