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Finding the Fourth Proportional to 143,489.88, 215,235.90 and 49,995.48

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Solution

The fourth proportional to 143,489.88, 215,235.90 and 49,995.48 is: 74,993.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,489.88 : 215,235.90 = 49,995.48 : x
  2. Step 2: Convert to fraction form
    143,489.88/215,235.90 = 49,995.48/x
  3. Step 3: Cross multiply
    143,489.88x = 215,235.90 × 49,995.48
  4. Step 4: Simplify right side
    143,489.88x = 10,760,822,133.73
  5. Step 5: Solve for x
    x = 10,760,822,133.73/143,489.88
  6. Step 6: Final answer
    x = 74,993.60

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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.