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Finding the Fourth Proportional to 221,909.40, 332,912.70 and 72,124.20

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Solution

The fourth proportional to 221,909.40, 332,912.70 and 72,124.20 is: 108,202.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,909.40 : 332,912.70 = 72,124.20 : x
  2. Step 2: Convert to fraction form
    221,909.40/332,912.70 = 72,124.20/x
  3. Step 3: Cross multiply
    221,909.40x = 332,912.70 × 72,124.20
  4. Step 4: Simplify right side
    221,909.40x = 24,011,062,157.34
  5. Step 5: Solve for x
    x = 24,011,062,157.34/221,909.40
  6. Step 6: Final answer
    x = 108,202.10

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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.