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Finding the Fourth Proportional to 53,805.64, 80,721.40 and 16,869.64

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Solution

The fourth proportional to 53,805.64, 80,721.40 and 16,869.64 is: 25,308.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,805.64 : 80,721.40 = 16,869.64 : x
  2. Step 2: Convert to fraction form
    53,805.64/80,721.40 = 16,869.64/x
  3. Step 3: Cross multiply
    53,805.64x = 80,721.40 × 16,869.64
  4. Step 4: Simplify right side
    53,805.64x = 1,361,740,958.30
  5. Step 5: Solve for x
    x = 1,361,740,958.30/53,805.64
  6. Step 6: Final answer
    x = 25,308.52

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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.