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Finding the Fourth Proportional to 70,078.80, 105,149 and 36,791.13

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Solution

The fourth proportional to 70,078.80, 105,149 and 36,791.13 is: 55,202.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,078.80 : 105,149 = 36,791.13 : x
  2. Step 2: Convert to fraction form
    70,078.80/105,149 = 36,791.13/x
  3. Step 3: Cross multiply
    70,078.80x = 105,149 × 36,791.13
  4. Step 4: Simplify right side
    70,078.80x = 3,868,550,528.37
  5. Step 5: Solve for x
    x = 3,868,550,528.37/70,078.80
  6. Step 6: Final answer
    x = 55,202.86

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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.