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Finding the Fourth Proportional to 336,996.72, 505,493.64 and 87,678

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Solution

The fourth proportional to 336,996.72, 505,493.64 and 87,678 is: 131,516.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,996.72 : 505,493.64 = 87,678 : x
  2. Step 2: Convert to fraction form
    336,996.72/505,493.64 = 87,678/x
  3. Step 3: Cross multiply
    336,996.72x = 505,493.64 × 87,678
  4. Step 4: Simplify right side
    336,996.72x = 44,320,671,367.92
  5. Step 5: Solve for x
    x = 44,320,671,367.92/336,996.72
  6. Step 6: Final answer
    x = 131,516.63

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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.