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Finding the Fourth Proportional to 143,371.54, 215,143.80 and 49,942.90

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Solution

The fourth proportional to 143,371.54, 215,143.80 and 49,942.90 is: 74,944.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,371.54 : 215,143.80 = 49,942.90 : x
  2. Step 2: Convert to fraction form
    143,371.54/215,143.80 = 49,942.90/x
  3. Step 3: Cross multiply
    143,371.54x = 215,143.80 × 49,942.90
  4. Step 4: Simplify right side
    143,371.54x = 10,744,905,289.02
  5. Step 5: Solve for x
    x = 10,744,905,289.02/143,371.54
  6. Step 6: Final answer
    x = 74,944.48

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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.