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Finding the Fourth Proportional to 53,942.60, 81,000.30 and 40,809.80

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Solution

The fourth proportional to 53,942.60, 81,000.30 and 40,809.80 is: 61,280.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,942.60 : 81,000.30 = 40,809.80 : x
  2. Step 2: Convert to fraction form
    53,942.60/81,000.30 = 40,809.80/x
  3. Step 3: Cross multiply
    53,942.60x = 81,000.30 × 40,809.80
  4. Step 4: Simplify right side
    53,942.60x = 3,305,606,042.94
  5. Step 5: Solve for x
    x = 3,305,606,042.94/53,942.60
  6. Step 6: Final answer
    x = 61,280.07

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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.