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Finding the Fourth Proportional to 87,091.92, 130,696.02 and 31,687.92

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Solution

The fourth proportional to 87,091.92, 130,696.02 and 31,687.92 is: 47,553.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,091.92 : 130,696.02 = 31,687.92 : x
  2. Step 2: Convert to fraction form
    87,091.92/130,696.02 = 31,687.92/x
  3. Step 3: Cross multiply
    87,091.92x = 130,696.02 × 31,687.92
  4. Step 4: Simplify right side
    87,091.92x = 4,141,485,026.08
  5. Step 5: Solve for x
    x = 4,141,485,026.08/87,091.92
  6. Step 6: Final answer
    x = 47,553.03

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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.