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Finding the Fourth Proportional to 203,553.30, 305,256.78 and 70,397.40

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Solution

The fourth proportional to 203,553.30, 305,256.78 and 70,397.40 is: 105,570.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,553.30 : 305,256.78 = 70,397.40 : x
  2. Step 2: Convert to fraction form
    203,553.30/305,256.78 = 70,397.40/x
  3. Step 3: Cross multiply
    203,553.30x = 305,256.78 × 70,397.40
  4. Step 4: Simplify right side
    203,553.30x = 21,489,283,644.37
  5. Step 5: Solve for x
    x = 21,489,283,644.37/203,553.30
  6. Step 6: Final answer
    x = 105,570.79

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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.