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Finding the Fourth Proportional to 81,092.34, 121,644.90 and 28,513.62

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Solution

The fourth proportional to 81,092.34, 121,644.90 and 28,513.62 is: 42,772.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,092.34 : 121,644.90 = 28,513.62 : x
  2. Step 2: Convert to fraction form
    81,092.34/121,644.90 = 28,513.62/x
  3. Step 3: Cross multiply
    81,092.34x = 121,644.90 × 28,513.62
  4. Step 4: Simplify right side
    81,092.34x = 3,468,536,453.54
  5. Step 5: Solve for x
    x = 3,468,536,453.54/81,092.34
  6. Step 6: Final answer
    x = 42,772.68

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1.5x scale

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.