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Finding the Fourth Proportional to 71,291.24, 98,383.16 and 39,028.64

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Solution

The fourth proportional to 71,291.24, 98,383.16 and 39,028.64 is: 53,860.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,291.24 : 98,383.16 = 39,028.64 : x
  2. Step 2: Convert to fraction form
    71,291.24/98,383.16 = 39,028.64/x
  3. Step 3: Cross multiply
    71,291.24x = 98,383.16 × 39,028.64
  4. Step 4: Simplify right side
    71,291.24x = 3,839,760,933.70
  5. Step 5: Solve for x
    x = 3,839,760,933.70/71,291.24
  6. Step 6: Final answer
    x = 53,860.21

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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.