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Finding the Fourth Proportional to 51,480.87, 71,040.12 and 28,509.04

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Solution

The fourth proportional to 51,480.87, 71,040.12 and 28,509.04 is: 39,340.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,480.87 : 71,040.12 = 28,509.04 : x
  2. Step 2: Convert to fraction form
    51,480.87/71,040.12 = 28,509.04/x
  3. Step 3: Cross multiply
    51,480.87x = 71,040.12 × 28,509.04
  4. Step 4: Simplify right side
    51,480.87x = 2,025,285,124.94
  5. Step 5: Solve for x
    x = 2,025,285,124.94/51,480.87
  6. Step 6: Final answer
    x = 39,340.54

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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.