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Finding the Fourth Proportional to 86,629.80, 129,993.30 and 36,701.40

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Solution

The fourth proportional to 86,629.80, 129,993.30 and 36,701.40 is: 55,072.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,629.80 : 129,993.30 = 36,701.40 : x
  2. Step 2: Convert to fraction form
    86,629.80/129,993.30 = 36,701.40/x
  3. Step 3: Cross multiply
    86,629.80x = 129,993.30 × 36,701.40
  4. Step 4: Simplify right side
    86,629.80x = 4,770,936,100.62
  5. Step 5: Solve for x
    x = 4,770,936,100.62/86,629.80
  6. Step 6: Final answer
    x = 55,072.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.