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Finding the Fourth Proportional to 71,716.89, 98,967.89 and 39,885.11

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Solution

The fourth proportional to 71,716.89, 98,967.89 and 39,885.11 is: 55,040.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,716.89 : 98,967.89 = 39,885.11 : x
  2. Step 2: Convert to fraction form
    71,716.89/98,967.89 = 39,885.11/x
  3. Step 3: Cross multiply
    71,716.89x = 98,967.89 × 39,885.11
  4. Step 4: Simplify right side
    71,716.89x = 3,947,344,484.85
  5. Step 5: Solve for x
    x = 3,947,344,484.85/71,716.89
  6. Step 6: Final answer
    x = 55,040.65

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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.