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Finding the Fourth Proportional to 71,716.82, 98,967.81 and 39,885.04

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Solution

The fourth proportional to 71,716.82, 98,967.81 and 39,885.04 is: 55,040.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,716.82 : 98,967.81 = 39,885.04 : x
  2. Step 2: Convert to fraction form
    71,716.82/98,967.81 = 39,885.04/x
  3. Step 3: Cross multiply
    71,716.82x = 98,967.81 × 39,885.04
  4. Step 4: Simplify right side
    71,716.82x = 3,947,334,366.30
  5. Step 5: Solve for x
    x = 3,947,334,366.30/71,716.82
  6. Step 6: Final answer
    x = 55,040.57

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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.