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Finding the Fourth Proportional to 69,855.87, 96,398.42 and 39,639.40

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Solution

The fourth proportional to 69,855.87, 96,398.42 and 39,639.40 is: 54,700.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,855.87 : 96,398.42 = 39,639.40 : x
  2. Step 2: Convert to fraction form
    69,855.87/96,398.42 = 39,639.40/x
  3. Step 3: Cross multiply
    69,855.87x = 96,398.42 × 39,639.40
  4. Step 4: Simplify right side
    69,855.87x = 3,821,175,529.75
  5. Step 5: Solve for x
    x = 3,821,175,529.75/69,855.87
  6. Step 6: Final answer
    x = 54,700.85

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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.