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Finding the Fourth Proportional to 87,007.50, 119,865.42 and 81,776.12

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Solution

The fourth proportional to 87,007.50, 119,865.42 and 81,776.12 is: 112,658.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,007.50 : 119,865.42 = 81,776.12 : x
  2. Step 2: Convert to fraction form
    87,007.50/119,865.42 = 81,776.12/x
  3. Step 3: Cross multiply
    87,007.50x = 119,865.42 × 81,776.12
  4. Step 4: Simplify right side
    87,007.50x = 9,802,128,370.44
  5. Step 5: Solve for x
    x = 9,802,128,370.44/87,007.50
  6. Step 6: Final answer
    x = 112,658.43

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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.