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Finding the Fourth Proportional to 72,285.21, 108,362.21 and 53,542.62

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Solution

The fourth proportional to 72,285.21, 108,362.21 and 53,542.62 is: 80,265.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,285.21 : 108,362.21 = 53,542.62 : x
  2. Step 2: Convert to fraction form
    72,285.21/108,362.21 = 53,542.62/x
  3. Step 3: Cross multiply
    72,285.21x = 108,362.21 × 53,542.62
  4. Step 4: Simplify right side
    72,285.21x = 5,801,996,364.68
  5. Step 5: Solve for x
    x = 5,801,996,364.68/72,285.21
  6. Step 6: Final answer
    x = 80,265.33

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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.