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Finding the Fourth Proportional to 65,940.46, 90,947.62 and 56,757.64

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Solution

The fourth proportional to 65,940.46, 90,947.62 and 56,757.64 is: 78,282.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,940.46 : 90,947.62 = 56,757.64 : x
  2. Step 2: Convert to fraction form
    65,940.46/90,947.62 = 56,757.64/x
  3. Step 3: Cross multiply
    65,940.46x = 90,947.62 × 56,757.64
  4. Step 4: Simplify right side
    65,940.46x = 5,161,972,634.15
  5. Step 5: Solve for x
    x = 5,161,972,634.15/65,940.46
  6. Step 6: Final answer
    x = 78,282.33

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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.