Home / 135,217.89-186,616.98-78,629.27

Finding the Fourth Proportional to 135,217.89, 186,616.98 and 78,629.27

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Solution

The fourth proportional to 135,217.89, 186,616.98 and 78,629.27 is: 108,517.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,217.89 : 186,616.98 = 78,629.27 : x
  2. Step 2: Convert to fraction form
    135,217.89/186,616.98 = 78,629.27/x
  3. Step 3: Cross multiply
    135,217.89x = 186,616.98 × 78,629.27
  4. Step 4: Simplify right side
    135,217.89x = 14,673,555,973.92
  5. Step 5: Solve for x
    x = 14,673,555,973.92/135,217.89
  6. Step 6: Final answer
    x = 108,517.86

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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.