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Finding the Fourth Proportional to 325,140.72, 487,757.64 and 100,520.70

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Solution

The fourth proportional to 325,140.72, 487,757.64 and 100,520.70 is: 150,795.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,140.72 : 487,757.64 = 100,520.70 : x
  2. Step 2: Convert to fraction form
    325,140.72/487,757.64 = 100,520.70/x
  3. Step 3: Cross multiply
    325,140.72x = 487,757.64 × 100,520.70
  4. Step 4: Simplify right side
    325,140.72x = 49,029,739,403.15
  5. Step 5: Solve for x
    x = 49,029,739,403.15/325,140.72
  6. Step 6: Final answer
    x = 150,795.44

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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.