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Finding the Fourth Proportional to 63,286.84, 87,294.69 and 40,589.88

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Solution

The fourth proportional to 63,286.84, 87,294.69 and 40,589.88 is: 55,987.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,286.84 : 87,294.69 = 40,589.88 : x
  2. Step 2: Convert to fraction form
    63,286.84/87,294.69 = 40,589.88/x
  3. Step 3: Cross multiply
    63,286.84x = 87,294.69 × 40,589.88
  4. Step 4: Simplify right side
    63,286.84x = 3,543,280,991.74
  5. Step 5: Solve for x
    x = 3,543,280,991.74/63,286.84
  6. Step 6: Final answer
    x = 55,987.64

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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.