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Finding the Fourth Proportional to 156,481.94, 215,939.25 and 92,781.62

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Solution

The fourth proportional to 156,481.94, 215,939.25 and 92,781.62 is: 128,035.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,481.94 : 215,939.25 = 92,781.62 : x
  2. Step 2: Convert to fraction form
    156,481.94/215,939.25 = 92,781.62/x
  3. Step 3: Cross multiply
    156,481.94x = 215,939.25 × 92,781.62
  4. Step 4: Simplify right side
    156,481.94x = 20,035,193,436.59
  5. Step 5: Solve for x
    x = 20,035,193,436.59/156,481.94
  6. Step 6: Final answer
    x = 128,035.18

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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.