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Finding the Fourth Proportional to 71,800.64, 99,082.56 and 39,968.48

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Solution

The fourth proportional to 71,800.64, 99,082.56 and 39,968.48 is: 55,155.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,800.64 : 99,082.56 = 39,968.48 : x
  2. Step 2: Convert to fraction form
    71,800.64/99,082.56 = 39,968.48/x
  3. Step 3: Cross multiply
    71,800.64x = 99,082.56 × 39,968.48
  4. Step 4: Simplify right side
    71,800.64x = 3,960,179,317.71
  5. Step 5: Solve for x
    x = 3,960,179,317.71/71,800.64
  6. Step 6: Final answer
    x = 55,155.21

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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.