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Finding the Fourth Proportional to 156,460.85, 215,887.11 and 91,940.60

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Solution

The fourth proportional to 156,460.85, 215,887.11 and 91,940.60 is: 126,861.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,460.85 : 215,887.11 = 91,940.60 : x
  2. Step 2: Convert to fraction form
    156,460.85/215,887.11 = 91,940.60/x
  3. Step 3: Cross multiply
    156,460.85x = 215,887.11 × 91,940.60
  4. Step 4: Simplify right side
    156,460.85x = 19,848,790,620.61
  5. Step 5: Solve for x
    x = 19,848,790,620.61/156,460.85
  6. Step 6: Final answer
    x = 126,861.07

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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.