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Finding the Fourth Proportional to 71,801.10, 99,082.85 and 39,969.32

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Solution

The fourth proportional to 71,801.10, 99,082.85 and 39,969.32 is: 55,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,801.10 : 99,082.85 = 39,969.32 : x
  2. Step 2: Convert to fraction form
    71,801.10/99,082.85 = 39,969.32/x
  3. Step 3: Cross multiply
    71,801.10x = 99,082.85 × 39,969.32
  4. Step 4: Simplify right side
    71,801.10x = 3,960,273,442.90
  5. Step 5: Solve for x
    x = 3,960,273,442.90/71,801.10
  6. Step 6: Final answer
    x = 55,156.17

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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.