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Finding the Fourth Proportional to 105,387.54, 158,049.41 and 55,440.09

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Solution

The fourth proportional to 105,387.54, 158,049.41 and 55,440.09 is: 83,143.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,387.54 : 158,049.41 = 55,440.09 : x
  2. Step 2: Convert to fraction form
    105,387.54/158,049.41 = 55,440.09/x
  3. Step 3: Cross multiply
    105,387.54x = 158,049.41 × 55,440.09
  4. Step 4: Simplify right side
    105,387.54x = 8,762,273,237.65
  5. Step 5: Solve for x
    x = 8,762,273,237.65/105,387.54
  6. Step 6: Final answer
    x = 83,143.35

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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.