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Finding the Fourth Proportional to 221,872.80, 332,938.80 and 81,645.60

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Solution

The fourth proportional to 221,872.80, 332,938.80 and 81,645.60 is: 122,516.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,872.80 : 332,938.80 = 81,645.60 : x
  2. Step 2: Convert to fraction form
    221,872.80/332,938.80 = 81,645.60/x
  3. Step 3: Cross multiply
    221,872.80x = 332,938.80 × 81,645.60
  4. Step 4: Simplify right side
    221,872.80x = 27,182,988,089.28
  5. Step 5: Solve for x
    x = 27,182,988,089.28/221,872.80
  6. Step 6: Final answer
    x = 122,516.09

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1.5x scale

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.