Home / 87,855.15-121,190.59-55,579.75

Finding the Fourth Proportional to 87,855.15, 121,190.59 and 55,579.75

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Solution

The fourth proportional to 87,855.15, 121,190.59 and 55,579.75 is: 76,668.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,855.15 : 121,190.59 = 55,579.75 : x
  2. Step 2: Convert to fraction form
    87,855.15/121,190.59 = 55,579.75/x
  3. Step 3: Cross multiply
    87,855.15x = 121,190.59 × 55,579.75
  4. Step 4: Simplify right side
    87,855.15x = 6,735,742,694.55
  5. Step 5: Solve for x
    x = 6,735,742,694.55/87,855.15
  6. Step 6: Final answer
    x = 76,668.73

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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.