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Finding the Fourth Proportional to 71,801.64, 99,082.44 and 39,969.72

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Solution

The fourth proportional to 71,801.64, 99,082.44 and 39,969.72 is: 55,156.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,801.64 : 99,082.44 = 39,969.72 : x
  2. Step 2: Convert to fraction form
    71,801.64/99,082.44 = 39,969.72/x
  3. Step 3: Cross multiply
    71,801.64x = 99,082.44 × 39,969.72
  4. Step 4: Simplify right side
    71,801.64x = 3,960,297,383.72
  5. Step 5: Solve for x
    x = 3,960,297,383.72/71,801.64
  6. Step 6: Final answer
    x = 55,156.09

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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.