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Finding the Fourth Proportional to 87,791.94, 131,430.87 and 54,411.30

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Solution

The fourth proportional to 87,791.94, 131,430.87 and 54,411.30 is: 81,457.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,791.94 : 131,430.87 = 54,411.30 : x
  2. Step 2: Convert to fraction form
    87,791.94/131,430.87 = 54,411.30/x
  3. Step 3: Cross multiply
    87,791.94x = 131,430.87 × 54,411.30
  4. Step 4: Simplify right side
    87,791.94x = 7,151,324,496.83
  5. Step 5: Solve for x
    x = 7,151,324,496.83/87,791.94
  6. Step 6: Final answer
    x = 81,457.64

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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.