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Finding the Fourth Proportional to 221,867.70, 332,801.55 and 81,608.10

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Solution

The fourth proportional to 221,867.70, 332,801.55 and 81,608.10 is: 122,412.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,867.70 : 332,801.55 = 81,608.10 : x
  2. Step 2: Convert to fraction form
    221,867.70/332,801.55 = 81,608.10/x
  3. Step 3: Cross multiply
    221,867.70x = 332,801.55 × 81,608.10
  4. Step 4: Simplify right side
    221,867.70x = 27,159,302,172.56
  5. Step 5: Solve for x
    x = 27,159,302,172.56/221,867.70
  6. Step 6: Final answer
    x = 122,412.15

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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.