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Finding the Fourth Proportional to 71,839.98, 99,135.27 and 39,568.31

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Solution

The fourth proportional to 71,839.98, 99,135.27 and 39,568.31 is: 54,602.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,839.98 : 99,135.27 = 39,568.31 : x
  2. Step 2: Convert to fraction form
    71,839.98/99,135.27 = 39,568.31/x
  3. Step 3: Cross multiply
    71,839.98x = 99,135.27 × 39,568.31
  4. Step 4: Simplify right side
    71,839.98x = 3,922,615,244.21
  5. Step 5: Solve for x
    x = 3,922,615,244.21/71,839.98
  6. Step 6: Final answer
    x = 54,602.12

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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.