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Finding the Fourth Proportional to 87,675.27, 120,991.90 and 47,388.91

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Solution

The fourth proportional to 87,675.27, 120,991.90 and 47,388.91 is: 65,396.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,675.27 : 120,991.90 = 47,388.91 : x
  2. Step 2: Convert to fraction form
    87,675.27/120,991.90 = 47,388.91/x
  3. Step 3: Cross multiply
    87,675.27x = 120,991.90 × 47,388.91
  4. Step 4: Simplify right side
    87,675.27x = 5,733,673,838.88
  5. Step 5: Solve for x
    x = 5,733,673,838.88/87,675.27
  6. Step 6: Final answer
    x = 65,396.71

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1.5x scale

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.