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Finding the Fourth Proportional to 51,759.92, 71,464.08 and 39,639

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Solution

The fourth proportional to 51,759.92, 71,464.08 and 39,639 is: 54,728.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,759.92 : 71,464.08 = 39,639 : x
  2. Step 2: Convert to fraction form
    51,759.92/71,464.08 = 39,639/x
  3. Step 3: Cross multiply
    51,759.92x = 71,464.08 × 39,639
  4. Step 4: Simplify right side
    51,759.92x = 2,832,764,667.12
  5. Step 5: Solve for x
    x = 2,832,764,667.12/51,759.92
  6. Step 6: Final answer
    x = 54,728.93

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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.