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Finding the Fourth Proportional to 221,105.40, 331,658.10 and 151,121.40

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Solution

The fourth proportional to 221,105.40, 331,658.10 and 151,121.40 is: 226,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,105.40 : 331,658.10 = 151,121.40 : x
  2. Step 2: Convert to fraction form
    221,105.40/331,658.10 = 151,121.40/x
  3. Step 3: Cross multiply
    221,105.40x = 331,658.10 × 151,121.40
  4. Step 4: Simplify right side
    221,105.40x = 50,120,636,393.34
  5. Step 5: Solve for x
    x = 50,120,636,393.34/221,105.40
  6. Step 6: Final answer
    x = 226,682.10

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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.