Home / 87,478.21-131,238.13-28,313.87

Finding the Fourth Proportional to 87,478.21, 131,238.13 and 28,313.87

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Solution

The fourth proportional to 87,478.21, 131,238.13 and 28,313.87 is: 42,477.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,478.21 : 131,238.13 = 28,313.87 : x
  2. Step 2: Convert to fraction form
    87,478.21/131,238.13 = 28,313.87/x
  3. Step 3: Cross multiply
    87,478.21x = 131,238.13 × 28,313.87
  4. Step 4: Simplify right side
    87,478.21x = 3,715,859,351.86
  5. Step 5: Solve for x
    x = 3,715,859,351.86/87,478.21
  6. Step 6: Final answer
    x = 42,477.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.