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Finding the Fourth Proportional to 352,375.82, 528,559.13 and 86,138.67

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Solution

The fourth proportional to 352,375.82, 528,559.13 and 86,138.67 is: 129,206.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,375.82 : 528,559.13 = 86,138.67 : x
  2. Step 2: Convert to fraction form
    352,375.82/528,559.13 = 86,138.67/x
  3. Step 3: Cross multiply
    352,375.82x = 528,559.13 × 86,138.67
  4. Step 4: Simplify right side
    352,375.82x = 45,529,380,474.56
  5. Step 5: Solve for x
    x = 45,529,380,474.56/352,375.82
  6. Step 6: Final answer
    x = 129,206.88

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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.