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Finding the Fourth Proportional to 199,805.40, 275,731.65 and 109,162.87

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Solution

The fourth proportional to 199,805.40, 275,731.65 and 109,162.87 is: 150,644.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,805.40 : 275,731.65 = 109,162.87 : x
  2. Step 2: Convert to fraction form
    199,805.40/275,731.65 = 109,162.87/x
  3. Step 3: Cross multiply
    199,805.40x = 275,731.65 × 109,162.87
  4. Step 4: Simplify right side
    199,805.40x = 30,099,658,263.84
  5. Step 5: Solve for x
    x = 30,099,658,263.84/199,805.40
  6. Step 6: Final answer
    x = 150,644.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.