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Finding the Fourth Proportional to 87,480.54, 120,709.44 and 49,747.50

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Solution

The fourth proportional to 87,480.54, 120,709.44 and 49,747.50 is: 68,643.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,480.54 : 120,709.44 = 49,747.50 : x
  2. Step 2: Convert to fraction form
    87,480.54/120,709.44 = 49,747.50/x
  3. Step 3: Cross multiply
    87,480.54x = 120,709.44 × 49,747.50
  4. Step 4: Simplify right side
    87,480.54x = 6,004,992,866.40
  5. Step 5: Solve for x
    x = 6,004,992,866.40/87,480.54
  6. Step 6: Final answer
    x = 68,643.76

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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.