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Finding the Fourth Proportional to 221,851.20, 332,776.80 and 81,591.60

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Solution

The fourth proportional to 221,851.20, 332,776.80 and 81,591.60 is: 122,387.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,851.20 : 332,776.80 = 81,591.60 : x
  2. Step 2: Convert to fraction form
    221,851.20/332,776.80 = 81,591.60/x
  3. Step 3: Cross multiply
    221,851.20x = 332,776.80 × 81,591.60
  4. Step 4: Simplify right side
    221,851.20x = 27,151,791,554.88
  5. Step 5: Solve for x
    x = 27,151,791,554.88/221,851.20
  6. Step 6: Final answer
    x = 122,387.40

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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.