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Finding the Fourth Proportional to 206,157.37, 308,944.45 and 87,709.45

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Solution

The fourth proportional to 206,157.37, 308,944.45 and 87,709.45 is: 131,440.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,157.37 : 308,944.45 = 87,709.45 : x
  2. Step 2: Convert to fraction form
    206,157.37/308,944.45 = 87,709.45/x
  3. Step 3: Cross multiply
    206,157.37x = 308,944.45 × 87,709.45
  4. Step 4: Simplify right side
    206,157.37x = 27,097,347,790.05
  5. Step 5: Solve for x
    x = 27,097,347,790.05/206,157.37
  6. Step 6: Final answer
    x = 131,440.11

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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.