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Finding the Fourth Proportional to 72,541.92, 100,119.60 and 49,861.92

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Solution

The fourth proportional to 72,541.92, 100,119.60 and 49,861.92 is: 68,817.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,541.92 : 100,119.60 = 49,861.92 : x
  2. Step 2: Convert to fraction form
    72,541.92/100,119.60 = 49,861.92/x
  3. Step 3: Cross multiply
    72,541.92x = 100,119.60 × 49,861.92
  4. Step 4: Simplify right side
    72,541.92x = 4,992,155,485.63
  5. Step 5: Solve for x
    x = 4,992,155,485.63/72,541.92
  6. Step 6: Final answer
    x = 68,817.53

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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.