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Finding the Fourth Proportional to 81,516.48, 122,274.68 and 53,808

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Solution

The fourth proportional to 81,516.48, 122,274.68 and 53,808 is: 80,711.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,516.48 : 122,274.68 = 53,808 : x
  2. Step 2: Convert to fraction form
    81,516.48/122,274.68 = 53,808/x
  3. Step 3: Cross multiply
    81,516.48x = 122,274.68 × 53,808
  4. Step 4: Simplify right side
    81,516.48x = 6,579,355,981.44
  5. Step 5: Solve for x
    x = 6,579,355,981.44/81,516.48
  6. Step 6: Final answer
    x = 80,711.97

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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.