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Finding the Fourth Proportional to 221,857.60, 332,786.40 and 162,371.20

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Solution

The fourth proportional to 221,857.60, 332,786.40 and 162,371.20 is: 243,556.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,857.60 : 332,786.40 = 162,371.20 : x
  2. Step 2: Convert to fraction form
    221,857.60/332,786.40 = 162,371.20/x
  3. Step 3: Cross multiply
    221,857.60x = 332,786.40 × 162,371.20
  4. Step 4: Simplify right side
    221,857.60x = 54,034,927,111.68
  5. Step 5: Solve for x
    x = 54,034,927,111.68/221,857.60
  6. Step 6: Final answer
    x = 243,556.80

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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.