Home / 87,021.56-120,087.42-51,213.68

Finding the Fourth Proportional to 87,021.56, 120,087.42 and 51,213.68

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Solution

The fourth proportional to 87,021.56, 120,087.42 and 51,213.68 is: 70,673.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,021.56 : 120,087.42 = 51,213.68 : x
  2. Step 2: Convert to fraction form
    87,021.56/120,087.42 = 51,213.68/x
  3. Step 3: Cross multiply
    87,021.56x = 120,087.42 × 51,213.68
  4. Step 4: Simplify right side
    87,021.56x = 6,150,118,699.91
  5. Step 5: Solve for x
    x = 6,150,118,699.91/87,021.56
  6. Step 6: Final answer
    x = 70,673.51

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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.