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Finding the Fourth Proportional to 72,621.84, 108,855.32 and 41,389.84

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Solution

The fourth proportional to 72,621.84, 108,855.32 and 41,389.84 is: 62,040.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,621.84 : 108,855.32 = 41,389.84 : x
  2. Step 2: Convert to fraction form
    72,621.84/108,855.32 = 41,389.84/x
  3. Step 3: Cross multiply
    72,621.84x = 108,855.32 × 41,389.84
  4. Step 4: Simplify right side
    72,621.84x = 4,505,504,277.95
  5. Step 5: Solve for x
    x = 4,505,504,277.95/72,621.84
  6. Step 6: Final answer
    x = 62,040.62

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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.