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Finding the Fourth Proportional to 221,908.40, 332,911.20 and 72,123.20

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Solution

The fourth proportional to 221,908.40, 332,911.20 and 72,123.20 is: 108,200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,908.40 : 332,911.20 = 72,123.20 : x
  2. Step 2: Convert to fraction form
    221,908.40/332,911.20 = 72,123.20/x
  3. Step 3: Cross multiply
    221,908.40x = 332,911.20 × 72,123.20
  4. Step 4: Simplify right side
    221,908.40x = 24,010,621,059.84
  5. Step 5: Solve for x
    x = 24,010,621,059.84/221,908.40
  6. Step 6: Final answer
    x = 108,200.60

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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.