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Finding the Fourth Proportional to 105,990, 159,057.92 and 43,660.48

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Solution

The fourth proportional to 105,990, 159,057.92 and 43,660.48 is: 65,520.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,990 : 159,057.92 = 43,660.48 : x
  2. Step 2: Convert to fraction form
    105,990/159,057.92 = 43,660.48/x
  3. Step 3: Cross multiply
    105,990x = 159,057.92 × 43,660.48
  4. Step 4: Simplify right side
    105,990x = 6,944,545,135.00
  5. Step 5: Solve for x
    x = 6,944,545,135.00/105,990
  6. Step 6: Final answer
    x = 65,520.76

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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.