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Finding the Fourth Proportional to 143,391.80, 214,650.30 and 127,645.40

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Solution

The fourth proportional to 143,391.80, 214,650.30 and 127,645.40 is: 191,078.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,391.80 : 214,650.30 = 127,645.40 : x
  2. Step 2: Convert to fraction form
    143,391.80/214,650.30 = 127,645.40/x
  3. Step 3: Cross multiply
    143,391.80x = 214,650.30 × 127,645.40
  4. Step 4: Simplify right side
    143,391.80x = 27,399,123,403.62
  5. Step 5: Solve for x
    x = 27,399,123,403.62/143,391.80
  6. Step 6: Final answer
    x = 191,078.73

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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.