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Finding the Fourth Proportional to 135,899.69, 203,695.72 and 69,198.92

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Solution

The fourth proportional to 135,899.69, 203,695.72 and 69,198.92 is: 103,720.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,899.69 : 203,695.72 = 69,198.92 : x
  2. Step 2: Convert to fraction form
    135,899.69/203,695.72 = 69,198.92/x
  3. Step 3: Cross multiply
    135,899.69x = 203,695.72 × 69,198.92
  4. Step 4: Simplify right side
    135,899.69x = 14,095,523,832.62
  5. Step 5: Solve for x
    x = 14,095,523,832.62/135,899.69
  6. Step 6: Final answer
    x = 103,720.06

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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.