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Finding the Fourth Proportional to 86,905.92, 119,861.76 and 55,044

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Solution

The fourth proportional to 86,905.92, 119,861.76 and 55,044 is: 75,917.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,905.92 : 119,861.76 = 55,044 : x
  2. Step 2: Convert to fraction form
    86,905.92/119,861.76 = 55,044/x
  3. Step 3: Cross multiply
    86,905.92x = 119,861.76 × 55,044
  4. Step 4: Simplify right side
    86,905.92x = 6,597,670,717.44
  5. Step 5: Solve for x
    x = 6,597,670,717.44/86,905.92
  6. Step 6: Final answer
    x = 75,917.39

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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.