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Finding the Fourth Proportional to 143,139.60, 214,644.60 and 54,363.60

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Solution

The fourth proportional to 143,139.60, 214,644.60 and 54,363.60 is: 81,520.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,139.60 : 214,644.60 = 54,363.60 : x
  2. Step 2: Convert to fraction form
    143,139.60/214,644.60 = 54,363.60/x
  3. Step 3: Cross multiply
    143,139.60x = 214,644.60 × 54,363.60
  4. Step 4: Simplify right side
    143,139.60x = 11,668,853,176.56
  5. Step 5: Solve for x
    x = 11,668,853,176.56/143,139.60
  6. Step 6: Final answer
    x = 81,520.79

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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.