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Finding the Fourth Proportional to 71,644.41, 98,864.74 and 39,811.41

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Solution

The fourth proportional to 71,644.41, 98,864.74 and 39,811.41 is: 54,937.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,644.41 : 98,864.74 = 39,811.41 : x
  2. Step 2: Convert to fraction form
    71,644.41/98,864.74 = 39,811.41/x
  3. Step 3: Cross multiply
    71,644.41x = 98,864.74 × 39,811.41
  4. Step 4: Simplify right side
    71,644.41x = 3,935,944,698.68
  5. Step 5: Solve for x
    x = 3,935,944,698.68/71,644.41
  6. Step 6: Final answer
    x = 54,937.22

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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.