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Finding the Fourth Proportional to 135,997.74, 204,031.21 and 79,885.30

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Solution

The fourth proportional to 135,997.74, 204,031.21 and 79,885.30 is: 119,848.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,997.74 : 204,031.21 = 79,885.30 : x
  2. Step 2: Convert to fraction form
    135,997.74/204,031.21 = 79,885.30/x
  3. Step 3: Cross multiply
    135,997.74x = 204,031.21 × 79,885.30
  4. Step 4: Simplify right side
    135,997.74x = 16,299,094,585.85
  5. Step 5: Solve for x
    x = 16,299,094,585.85/135,997.74
  6. Step 6: Final answer
    x = 119,848.27

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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.