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Finding the Fourth Proportional to 87,858, 121,243.86 and 47,571.75

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Solution

The fourth proportional to 87,858, 121,243.86 and 47,571.75 is: 65,648.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,858 : 121,243.86 = 47,571.75 : x
  2. Step 2: Convert to fraction form
    87,858/121,243.86 = 47,571.75/x
  3. Step 3: Cross multiply
    87,858x = 121,243.86 × 47,571.75
  4. Step 4: Simplify right side
    87,858x = 5,767,782,596.96
  5. Step 5: Solve for x
    x = 5,767,782,596.96/87,858
  6. Step 6: Final answer
    x = 65,648.92

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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.