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Finding the Fourth Proportional to 221,529.60, 332,078.40 and 126,662.40

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Solution

The fourth proportional to 221,529.60, 332,078.40 and 126,662.40 is: 189,870.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,529.60 : 332,078.40 = 126,662.40 : x
  2. Step 2: Convert to fraction form
    221,529.60/332,078.40 = 126,662.40/x
  3. Step 3: Cross multiply
    221,529.60x = 332,078.40 × 126,662.40
  4. Step 4: Simplify right side
    221,529.60x = 42,061,847,132.16
  5. Step 5: Solve for x
    x = 42,061,847,132.16/221,529.60
  6. Step 6: Final answer
    x = 189,870.10

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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.