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Finding the Fourth Proportional to 71,371.91, 98,489.36 and 39,538.91

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Solution

The fourth proportional to 71,371.91, 98,489.36 and 39,538.91 is: 54,561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,371.91 : 98,489.36 = 39,538.91 : x
  2. Step 2: Convert to fraction form
    71,371.91/98,489.36 = 39,538.91/x
  3. Step 3: Cross multiply
    71,371.91x = 98,489.36 × 39,538.91
  4. Step 4: Simplify right side
    71,371.91x = 3,894,161,694.33
  5. Step 5: Solve for x
    x = 3,894,161,694.33/71,371.91
  6. Step 6: Final answer
    x = 54,561.55

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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.