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Finding the Fourth Proportional to 68,338.76, 102,515.44 and 28,899.86

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Solution

The fourth proportional to 68,338.76, 102,515.44 and 28,899.86 is: 43,352.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,338.76 : 102,515.44 = 28,899.86 : x
  2. Step 2: Convert to fraction form
    68,338.76/102,515.44 = 28,899.86/x
  3. Step 3: Cross multiply
    68,338.76x = 102,515.44 × 28,899.86
  4. Step 4: Simplify right side
    68,338.76x = 2,962,681,975.63
  5. Step 5: Solve for x
    x = 2,962,681,975.63/68,338.76
  6. Step 6: Final answer
    x = 43,352.88

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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.