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Finding the Fourth Proportional to 135,031.86, 202,674.92 and 68,519.72

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Solution

The fourth proportional to 135,031.86, 202,674.92 and 68,519.72 is: 102,844.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,031.86 : 202,674.92 = 68,519.72 : x
  2. Step 2: Convert to fraction form
    135,031.86/202,674.92 = 68,519.72/x
  3. Step 3: Cross multiply
    135,031.86x = 202,674.92 × 68,519.72
  4. Step 4: Simplify right side
    135,031.86x = 13,887,228,769.42
  5. Step 5: Solve for x
    x = 13,887,228,769.42/135,031.86
  6. Step 6: Final answer
    x = 102,844.09

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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.