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Finding the Fourth Proportional to 143,972, 215,991.72 and 49,202.96

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Solution

The fourth proportional to 143,972, 215,991.72 and 49,202.96 is: 73,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,972 : 215,991.72 = 49,202.96 : x
  2. Step 2: Convert to fraction form
    143,972/215,991.72 = 49,202.96/x
  3. Step 3: Cross multiply
    143,972x = 215,991.72 × 49,202.96
  4. Step 4: Simplify right side
    143,972x = 10,627,431,959.49
  5. Step 5: Solve for x
    x = 10,627,431,959.49/143,972
  6. Step 6: Final answer
    x = 73,815.96

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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.