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Finding the Fourth Proportional to 220,705.20, 331,230.60 and 102,391.20

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Solution

The fourth proportional to 220,705.20, 331,230.60 and 102,391.20 is: 153,666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,705.20 : 331,230.60 = 102,391.20 : x
  2. Step 2: Convert to fraction form
    220,705.20/331,230.60 = 102,391.20/x
  3. Step 3: Cross multiply
    220,705.20x = 331,230.60 × 102,391.20
  4. Step 4: Simplify right side
    220,705.20x = 33,915,098,610.72
  5. Step 5: Solve for x
    x = 33,915,098,610.72/220,705.20
  6. Step 6: Final answer
    x = 153,666.97

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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.