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Finding the Fourth Proportional to 221,752.20, 332,628.30 and 81,492.60

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Solution

The fourth proportional to 221,752.20, 332,628.30 and 81,492.60 is: 122,238.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,752.20 : 332,628.30 = 81,492.60 : x
  2. Step 2: Convert to fraction form
    221,752.20/332,628.30 = 81,492.60/x
  3. Step 3: Cross multiply
    221,752.20x = 332,628.30 × 81,492.60
  4. Step 4: Simplify right side
    221,752.20x = 27,106,745,000.58
  5. Step 5: Solve for x
    x = 27,106,745,000.58/221,752.20
  6. Step 6: Final answer
    x = 122,238.90

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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.