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Finding the Fourth Proportional to 262,486.35, 393,786.94 and 85,011.30

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Solution

The fourth proportional to 262,486.35, 393,786.94 and 85,011.30 is: 127,535.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,486.35 : 393,786.94 = 85,011.30 : x
  2. Step 2: Convert to fraction form
    262,486.35/393,786.94 = 85,011.30/x
  3. Step 3: Cross multiply
    262,486.35x = 393,786.94 × 85,011.30
  4. Step 4: Simplify right side
    262,486.35x = 33,476,339,692.42
  5. Step 5: Solve for x
    x = 33,476,339,692.42/262,486.35
  6. Step 6: Final answer
    x = 127,535.54

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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.