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Finding the Fourth Proportional to 199,431.70, 299,142.69 and 81,073.69

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Solution

The fourth proportional to 199,431.70, 299,142.69 and 81,073.69 is: 121,608.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,431.70 : 299,142.69 = 81,073.69 : x
  2. Step 2: Convert to fraction form
    199,431.70/299,142.69 = 81,073.69/x
  3. Step 3: Cross multiply
    199,431.70x = 299,142.69 × 81,073.69
  4. Step 4: Simplify right side
    199,431.70x = 24,252,601,714.83
  5. Step 5: Solve for x
    x = 24,252,601,714.83/199,431.70
  6. Step 6: Final answer
    x = 121,608.56

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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.