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Finding the Fourth Proportional to 143,998.50, 215,975.85 and 55,293.78

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Solution

The fourth proportional to 143,998.50, 215,975.85 and 55,293.78 is: 82,932.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,998.50 : 215,975.85 = 55,293.78 : x
  2. Step 2: Convert to fraction form
    143,998.50/215,975.85 = 55,293.78/x
  3. Step 3: Cross multiply
    143,998.50x = 215,975.85 × 55,293.78
  4. Step 4: Simplify right side
    143,998.50x = 11,942,121,135.21
  5. Step 5: Solve for x
    x = 11,942,121,135.21/143,998.50
  6. Step 6: Final answer
    x = 82,932.26

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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.