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Finding the Fourth Proportional to 91,305.75, 136,958.67 and 28,976.25

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Solution

The fourth proportional to 91,305.75, 136,958.67 and 28,976.25 is: 43,464.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,305.75 : 136,958.67 = 28,976.25 : x
  2. Step 2: Convert to fraction form
    91,305.75/136,958.67 = 28,976.25/x
  3. Step 3: Cross multiply
    91,305.75x = 136,958.67 × 28,976.25
  4. Step 4: Simplify right side
    91,305.75x = 3,968,548,661.59
  5. Step 5: Solve for x
    x = 3,968,548,661.59/91,305.75
  6. Step 6: Final answer
    x = 43,464.39

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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.