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Finding the Fourth Proportional to 81,903.36, 122,772.96 and 52,354.56

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Solution

The fourth proportional to 81,903.36, 122,772.96 and 52,354.56 is: 78,479.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,903.36 : 122,772.96 = 52,354.56 : x
  2. Step 2: Convert to fraction form
    81,903.36/122,772.96 = 52,354.56/x
  3. Step 3: Cross multiply
    81,903.36x = 122,772.96 × 52,354.56
  4. Step 4: Simplify right side
    81,903.36x = 6,427,724,300.70
  5. Step 5: Solve for x
    x = 6,427,724,300.70/81,903.36
  6. Step 6: Final answer
    x = 78,479.37

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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.