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Finding the Fourth Proportional to 217,115.80, 325,625.10 and 142,757.80

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Solution

The fourth proportional to 217,115.80, 325,625.10 and 142,757.80 is: 214,104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,115.80 : 325,625.10 = 142,757.80 : x
  2. Step 2: Convert to fraction form
    217,115.80/325,625.10 = 142,757.80/x
  3. Step 3: Cross multiply
    217,115.80x = 325,625.10 × 142,757.80
  4. Step 4: Simplify right side
    217,115.80x = 46,485,522,900.78
  5. Step 5: Solve for x
    x = 46,485,522,900.78/217,115.80
  6. Step 6: Final answer
    x = 214,104.74

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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.