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Finding the Fourth Proportional to 123,911.20, 185,939.70 and 45,033.40

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Solution

The fourth proportional to 123,911.20, 185,939.70 and 45,033.40 is: 67,576.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,911.20 : 185,939.70 = 45,033.40 : x
  2. Step 2: Convert to fraction form
    123,911.20/185,939.70 = 45,033.40/x
  3. Step 3: Cross multiply
    123,911.20x = 185,939.70 × 45,033.40
  4. Step 4: Simplify right side
    123,911.20x = 8,373,496,885.98
  5. Step 5: Solve for x
    x = 8,373,496,885.98/123,911.20
  6. Step 6: Final answer
    x = 67,576.59

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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.