Home / 87,190.47-120,308.50-51,375.61

Finding the Fourth Proportional to 87,190.47, 120,308.50 and 51,375.61

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Solution

The fourth proportional to 87,190.47, 120,308.50 and 51,375.61 is: 70,889.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,190.47 : 120,308.50 = 51,375.61 : x
  2. Step 2: Convert to fraction form
    87,190.47/120,308.50 = 51,375.61/x
  3. Step 3: Cross multiply
    87,190.47x = 120,308.50 × 51,375.61
  4. Step 4: Simplify right side
    87,190.47x = 6,180,922,575.69
  5. Step 5: Solve for x
    x = 6,180,922,575.69/87,190.47
  6. Step 6: Final answer
    x = 70,889.89

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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.