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Finding the Fourth Proportional to 54,636.70, 81,969.63 and 19,579.90

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Solution

The fourth proportional to 54,636.70, 81,969.63 and 19,579.90 is: 29,375.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,636.70 : 81,969.63 = 19,579.90 : x
  2. Step 2: Convert to fraction form
    54,636.70/81,969.63 = 19,579.90/x
  3. Step 3: Cross multiply
    54,636.70x = 81,969.63 × 19,579.90
  4. Step 4: Simplify right side
    54,636.70x = 1,604,957,158.44
  5. Step 5: Solve for x
    x = 1,604,957,158.44/54,636.70
  6. Step 6: Final answer
    x = 29,375.07

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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.