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Finding the Fourth Proportional to 72,911.89, 109,761.73 and 65,579.79

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Solution

The fourth proportional to 72,911.89, 109,761.73 and 65,579.79 is: 98,723.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,911.89 : 109,761.73 = 65,579.79 : x
  2. Step 2: Convert to fraction form
    72,911.89/109,761.73 = 65,579.79/x
  3. Step 3: Cross multiply
    72,911.89x = 109,761.73 × 65,579.79
  4. Step 4: Simplify right side
    72,911.89x = 7,198,151,203.44
  5. Step 5: Solve for x
    x = 7,198,151,203.44/72,911.89
  6. Step 6: Final answer
    x = 98,723.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.