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Finding the Fourth Proportional to 143,825.92, 215,748.87 and 43,978.44

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Solution

The fourth proportional to 143,825.92, 215,748.87 and 43,978.44 is: 65,970.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,825.92 : 215,748.87 = 43,978.44 : x
  2. Step 2: Convert to fraction form
    143,825.92/215,748.87 = 43,978.44/x
  3. Step 3: Cross multiply
    143,825.92x = 215,748.87 × 43,978.44
  4. Step 4: Simplify right side
    143,825.92x = 9,488,298,734.36
  5. Step 5: Solve for x
    x = 9,488,298,734.36/143,825.92
  6. Step 6: Final answer
    x = 65,970.71

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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.