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Finding the Fourth Proportional to 43,762.85, 65,643.86 and 18,786.71

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Solution

The fourth proportional to 43,762.85, 65,643.86 and 18,786.71 is: 28,179.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,762.85 : 65,643.86 = 18,786.71 : x
  2. Step 2: Convert to fraction form
    43,762.85/65,643.86 = 18,786.71/x
  3. Step 3: Cross multiply
    43,762.85x = 65,643.86 × 18,786.71
  4. Step 4: Simplify right side
    43,762.85x = 1,233,231,738.95
  5. Step 5: Solve for x
    x = 1,233,231,738.95/43,762.85
  6. Step 6: Final answer
    x = 28,179.88

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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.