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Finding the Fourth Proportional to 203,553.15, 304,921.48 and 103,709.31

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Solution

The fourth proportional to 203,553.15, 304,921.48 and 103,709.31 is: 155,355.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,553.15 : 304,921.48 = 103,709.31 : x
  2. Step 2: Convert to fraction form
    203,553.15/304,921.48 = 103,709.31/x
  3. Step 3: Cross multiply
    203,553.15x = 304,921.48 × 103,709.31
  4. Step 4: Simplify right side
    203,553.15x = 31,623,196,294.98
  5. Step 5: Solve for x
    x = 31,623,196,294.98/203,553.15
  6. Step 6: Final answer
    x = 155,355.97

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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.