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Finding the Fourth Proportional to 53,209.49, 79,866.18 and 43,943.90

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Solution

The fourth proportional to 53,209.49, 79,866.18 and 43,943.90 is: 65,958.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,209.49 : 79,866.18 = 43,943.90 : x
  2. Step 2: Convert to fraction form
    53,209.49/79,866.18 = 43,943.90/x
  3. Step 3: Cross multiply
    53,209.49x = 79,866.18 × 43,943.90
  4. Step 4: Simplify right side
    53,209.49x = 3,509,631,107.75
  5. Step 5: Solve for x
    x = 3,509,631,107.75/53,209.49
  6. Step 6: Final answer
    x = 65,958.75

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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.