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Finding the Fourth Proportional to 221,886.80, 332,830.20 and 127,408.40

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Solution

The fourth proportional to 221,886.80, 332,830.20 and 127,408.40 is: 191,112.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,886.80 : 332,830.20 = 127,408.40 : x
  2. Step 2: Convert to fraction form
    221,886.80/332,830.20 = 127,408.40/x
  3. Step 3: Cross multiply
    221,886.80x = 332,830.20 × 127,408.40
  4. Step 4: Simplify right side
    221,886.80x = 42,405,363,253.68
  5. Step 5: Solve for x
    x = 42,405,363,253.68/221,886.80
  6. Step 6: Final answer
    x = 191,112.60

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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.