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Finding the Fourth Proportional to 203,979.34, 305,709.39 and 115,282.30

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Solution

The fourth proportional to 203,979.34, 305,709.39 and 115,282.30 is: 172,776.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,979.34 : 305,709.39 = 115,282.30 : x
  2. Step 2: Convert to fraction form
    203,979.34/305,709.39 = 115,282.30/x
  3. Step 3: Cross multiply
    203,979.34x = 305,709.39 × 115,282.30
  4. Step 4: Simplify right side
    203,979.34x = 35,242,881,610.80
  5. Step 5: Solve for x
    x = 35,242,881,610.80/203,979.34
  6. Step 6: Final answer
    x = 172,776.72

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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.