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Finding the Fourth Proportional to 221,857.70, 332,936.29 and 86,905.03

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Solution

The fourth proportional to 221,857.70, 332,936.29 and 86,905.03 is: 130,416.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,857.70 : 332,936.29 = 86,905.03 : x
  2. Step 2: Convert to fraction form
    221,857.70/332,936.29 = 86,905.03/x
  3. Step 3: Cross multiply
    221,857.70x = 332,936.29 × 86,905.03
  4. Step 4: Simplify right side
    221,857.70x = 28,933,837,220.94
  5. Step 5: Solve for x
    x = 28,933,837,220.94/221,857.70
  6. Step 6: Final answer
    x = 130,416.20

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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.