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Finding the Fourth Proportional to 221,438.70, 332,158.05 and 81,179.10

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Solution

The fourth proportional to 221,438.70, 332,158.05 and 81,179.10 is: 121,768.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,438.70 : 332,158.05 = 81,179.10 : x
  2. Step 2: Convert to fraction form
    221,438.70/332,158.05 = 81,179.10/x
  3. Step 3: Cross multiply
    221,438.70x = 332,158.05 × 81,179.10
  4. Step 4: Simplify right side
    221,438.70x = 26,964,291,556.76
  5. Step 5: Solve for x
    x = 26,964,291,556.76/221,438.70
  6. Step 6: Final answer
    x = 121,768.65

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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.