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Finding the Fourth Proportional to 71,911.88, 99,241.80 and 40,081.02

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Solution

The fourth proportional to 71,911.88, 99,241.80 and 40,081.02 is: 55,313.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,911.88 : 99,241.80 = 40,081.02 : x
  2. Step 2: Convert to fraction form
    71,911.88/99,241.80 = 40,081.02/x
  3. Step 3: Cross multiply
    71,911.88x = 99,241.80 × 40,081.02
  4. Step 4: Simplify right side
    71,911.88x = 3,977,712,570.64
  5. Step 5: Solve for x
    x = 3,977,712,570.64/71,911.88
  6. Step 6: Final answer
    x = 55,313.71

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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.